Ti2NbNi9 is Uranium Silicide-derived structured and crystallizes in the hexagonal P-6m2 space group. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to three Ni(6,6); three equivalent Ni(7); and six Ni(4,4) atoms to form TiNi12 cuboctahedra that share corners with three equivalent Nb(1)Ni12 cuboctahedra; corners with three equivalent Nb(2)Ni12 cuboctahedra; corners with six equivalent Ti(1)Ni12 cuboctahedra; edges with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with three Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra; faces with three equivalent Ti(3)Ni12 cuboctahedra; faces with three equivalent Ti(4)Ni12 cuboctahedra; faces with three Ni(6,6)Ti3NbNi8 cuboctahedra; faces with three equivalent Ni(7)Ti3NbNi8 cuboctahedra; and faces with six Ni(4,4)Ti4Ni8 cuboctahedra. In the second Ti site, Ti(2) is bonded to three equivalent Ni(1); three Ni(3,3); and six Ni(5,5) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(2)Ni12 cuboctahedra; corners with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with three equivalent Nb(1)Ni12 cuboctahedra; faces with three equivalent Nb(3)Ni12 cuboctahedra; faces with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra. In the third Ti site, Ti(3) is bonded to three Ni(2,2); three Ni(4,4); and six Ni(6,6) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(3)Ni12 cuboctahedra; corners with six Ni(6,6)Ti3NbNi8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with three equivalent Ti(1)Ni12 cuboctahedra; faces with three equivalent Nb(2)Ni12 cuboctahedra; faces with three Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(4,4)Ti4Ni8 cuboctahedra; and faces with six Ni(6,6)Ti3NbNi8 cuboctahedra. In the fourth Ti site, Ti(4) is bonded to three equivalent Ni(1); three Ni(4,4); and six equivalent Ni(7) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(4)Ni12 cuboctahedra; corners with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; corners with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra; faces with three equivalent Ti(1)Ni12 cuboctahedra; faces with three equivalent Nb(1)Ni12 cuboctahedra; faces with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(4,4)Ti4Ni8 cuboctahedra; and faces with six equivalent Ni(7)Ti3NbNi8 cuboctahedra. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to three Ni(5,5); three equivalent Ni(7); and six equivalent Ni(1) atoms to form NbNi12 cuboctahedra that share corners with three equivalent Ti(1)Ni12 cuboctahedra; corners with three equivalent Nb(3)Ni12 cuboctahedra; corners with six equivalent Nb(1)Ni12 cuboctahedra; edges with three Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with three Ni(4,4)Ti4Ni8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; faces with three equivalent Ti(2)Ni12 cuboctahedra; faces with three equivalent Ti(4)Ni12 cuboctahedra; faces with three Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with three equivalent Ni(7)Ti3NbNi8 cuboctahedra; and faces with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra. In the second Nb site, Nb(2) is bonded to six Ni(2,2) and six Ni(6,6) atoms to form NbNi12 cuboctahedra that share corners with six equivalent Ti(1)Ni12 cuboctahedra; corners with six equivalent Nb(2)Ni12 cuboctahedra; edges with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra; edges with twelve Ni(6,6)Ti3NbNi8 cuboctahedra; faces with six equivalent Ti(3)Ni12 cuboctahedra; faces with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(6,6)Ti3NbNi8 cuboctahedra. In the third Nb site, Nb(3) is bonded to six Ni(3,3) and six Ni(5,5) atoms to form NbNi12 cuboctahedra that share corners with six equivalent Nb(1)Ni12 cuboctahedra; corners with six equivalent Nb(3)Ni12 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with twelve Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with six equivalent Ti(2)Ni12 cuboctahedra; faces with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one Ti(2); one Ti(4); two equivalent Nb(1); two Ni(5,5); two equivalent Ni(7); and four equivalent Ni(1) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with three equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(4)Ti4Ni8 cuboctahedra; corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra;  an edgeedge with one Ti(1)Ni12 cuboctahedra;  an edgeedge with one Nb(3)Ni12 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with two Ni(4,4)Ti4Ni8 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Nb(1)Ni12 cuboctahedra; faces with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent Ti(3), two equivalent Nb(2), four equivalent Ni(2), and four equivalent Ni(6) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ti(3)Ni12 cuboctahedra; edges with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra; edges with eight equivalent Ni(6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with two equivalent Nb(2)Ni12 cuboctahedra; faces with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(6,6)Ti3NbNi8 cuboctahedra. In the third Ni site, Ni(2) is bonded to two equivalent Ti(3); two equivalent Nb(2); four Ni(2,2); and four Ni(6,6) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ti(3)Ni12 cuboctahedra; edges with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with eight Ni(6,6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with two equivalent Nb(2)Ni12 cuboctahedra; faces with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(6,6)Ti3NbNi8 cuboctahedra. In the fourth Ni site, Ni(3) is bonded to two equivalent Ti(2); two equivalent Nb(3); four Ni(3,3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ti(2)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with eight Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with two equivalent Nb(3)Ni12 cuboctahedra; faces with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra. In the fifth Ni site, Ni(4) is bonded to one Ti(3); one Ti(4); two equivalent Ti(1); two equivalent Ni(6); two equivalent Ni(7); and four Ni(4,4) atoms to form distorted NiTi4Ni8 cuboctahedra that share corners with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra;  an edgeedge with one Nb(1)Ni12 cuboctahedra;  an edgeedge with one Nb(2)Ni12 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(6)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Ti(1)Ni12 cuboctahedra; faces with four Ni(4,4)Ti4Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. In the sixth Ni site, Ni(3) is bonded to two equivalent Ti(2); two equivalent Nb(3); four equivalent Ni(3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ti(2)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with eight Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with two equivalent Nb(3)Ni12 cuboctahedra; faces with four equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra. In the seventh Ni site, Ni(4) is bonded to one Ti(3); one Ti(4); two equivalent Ti(1); two Ni(6,6); two equivalent Ni(7); and four equivalent Ni(4) atoms to form distorted NiTi4Ni8 cuboctahedra that share corners with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra;  an edgeedge with one Nb(1)Ni12 cuboctahedra;  an edgeedge with one Nb(2)Ni12 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with two Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(6,6)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Ti(1)Ni12 cuboctahedra; faces with four equivalent Ni(4)Ti4Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. In the eighth Ni site, Ni(5) is bonded to two equivalent Ti(2); one Nb(1); one Nb(3); two equivalent Ni(1); two Ni(3,3); and four equivalent Ni(5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Nb(3)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra. In the ninth Ni site, Ni(6) is bonded to one Ti(1); two equivalent Ti(3); one Nb(2); two Ni(2,2); two Ni(4,4); and four Ni(6,6) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(6,6)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(6,6)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(2)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with five Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra. In the tenth Ni site, Ni(7) is bonded to one Ti(1); two equivalent Ti(4); one Nb(1); two equivalent Ni(1); two Ni(4,4); and four equivalent Ni(7) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with four equivalent Ni(5)Ti2Nb2Ni8 cuboctahedra; corners with four Ni(6,6)Ti3NbNi8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Ni(5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Ni(6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(4)Ni12 cuboctahedra; faces with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra. In the eleventh Ni site, Ni(5) is bonded to two equivalent Ti(2); one Nb(1); one Nb(3); two equivalent Ni(1); two Ni(3,3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(5,5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Nb(3)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra. In the twelfth Ni site, Ni(6) is bonded to one Ti(1); two equivalent Ti(3); one Nb(2); two equivalent Ni(2); two Ni(4,4); and four equivalent Ni(6) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(6,6)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(6)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(2)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with five Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra.
Ti2NbNi9 is Uranium Silicide-derived structured and crystallizes in the hexagonal P-6m2 space group. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to three Ni(6,6); three equivalent Ni(7); and six Ni(4,4) atoms to form TiNi12 cuboctahedra that share corners with three equivalent Nb(1)Ni12 cuboctahedra; corners with three equivalent Nb(2)Ni12 cuboctahedra; corners with six equivalent Ti(1)Ni12 cuboctahedra; edges with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with three Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra; faces with three equivalent Ti(3)Ni12 cuboctahedra; faces with three equivalent Ti(4)Ni12 cuboctahedra; faces with three Ni(6,6)Ti3NbNi8 cuboctahedra; faces with three equivalent Ni(7)Ti3NbNi8 cuboctahedra; and faces with six Ni(4,4)Ti4Ni8 cuboctahedra. All Ti(1)-Ni(6,6) bond lengths are 2.55 Å. All Ti(1)-Ni(7) bond lengths are 2.56 Å. All Ti(1)-Ni(4,4) bond lengths are 2.56 Å. In the second Ti site, Ti(2) is bonded to three equivalent Ni(1); three Ni(3,3); and six Ni(5,5) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(2)Ni12 cuboctahedra; corners with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with three equivalent Nb(1)Ni12 cuboctahedra; faces with three equivalent Nb(3)Ni12 cuboctahedra; faces with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra. All Ti(2)-Ni(1) bond lengths are 2.59 Å. All Ti(2)-Ni(3,3) bond lengths are 2.60 Å. All Ti(2)-Ni(5,5) bond lengths are 2.56 Å. In the third Ti site, Ti(3) is bonded to three Ni(2,2); three Ni(4,4); and six Ni(6,6) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(3)Ni12 cuboctahedra; corners with six Ni(6,6)Ti3NbNi8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with three equivalent Ti(1)Ni12 cuboctahedra; faces with three equivalent Nb(2)Ni12 cuboctahedra; faces with three Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(4,4)Ti4Ni8 cuboctahedra; and faces with six Ni(6,6)Ti3NbNi8 cuboctahedra. All Ti(3)-Ni(2,2) bond lengths are 2.61 Å. All Ti(3)-Ni(4,4) bond lengths are 2.59 Å. All Ti(3)-Ni(6,6) bond lengths are 2.56 Å. In the fourth Ti site, Ti(4) is bonded to three equivalent Ni(1); three Ni(4,4); and six equivalent Ni(7) atoms to form TiNi12 cuboctahedra that share corners with six equivalent Ti(4)Ni12 cuboctahedra; corners with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; corners with six Ni(6,6)Ti3NbNi8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra; faces with three equivalent Ti(1)Ni12 cuboctahedra; faces with three equivalent Nb(1)Ni12 cuboctahedra; faces with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with three Ni(4,4)Ti4Ni8 cuboctahedra; and faces with six equivalent Ni(7)Ti3NbNi8 cuboctahedra. All Ti(4)-Ni(1) bond lengths are 2.61 Å. All Ti(4)-Ni(4,4) bond lengths are 2.58 Å. All Ti(4)-Ni(7) bond lengths are 2.56 Å. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to three Ni(5,5); three equivalent Ni(7); and six equivalent Ni(1) atoms to form NbNi12 cuboctahedra that share corners with three equivalent Ti(1)Ni12 cuboctahedra; corners with three equivalent Nb(3)Ni12 cuboctahedra; corners with six equivalent Nb(1)Ni12 cuboctahedra; edges with three Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with three Ni(4,4)Ti4Ni8 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; faces with three equivalent Ti(2)Ni12 cuboctahedra; faces with three equivalent Ti(4)Ni12 cuboctahedra; faces with three Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with three equivalent Ni(7)Ti3NbNi8 cuboctahedra; and faces with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra. All Nb(1)-Ni(5,5) bond lengths are 2.60 Å. All Nb(1)-Ni(7) bond lengths are 2.56 Å. All Nb(1)-Ni(1) bond lengths are 2.56 Å. In the second Nb site, Nb(2) is bonded to six Ni(2,2) and six Ni(6,6) atoms to form NbNi12 cuboctahedra that share corners with six equivalent Ti(1)Ni12 cuboctahedra; corners with six equivalent Nb(2)Ni12 cuboctahedra; edges with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(4,4)Ti4Ni8 cuboctahedra; edges with twelve Ni(6,6)Ti3NbNi8 cuboctahedra; faces with six equivalent Ti(3)Ni12 cuboctahedra; faces with six Ni(2,2)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(6,6)Ti3NbNi8 cuboctahedra. All Nb(2)-Ni(2,2) bond lengths are 2.56 Å. All Nb(2)-Ni(6,6) bond lengths are 2.59 Å. In the third Nb site, Nb(3) is bonded to six Ni(3,3) and six Ni(5,5) atoms to form NbNi12 cuboctahedra that share corners with six equivalent Nb(1)Ni12 cuboctahedra; corners with six equivalent Nb(3)Ni12 cuboctahedra; edges with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with twelve Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with six equivalent Ti(2)Ni12 cuboctahedra; faces with six Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with six Ni(5,5)Ti2Nb2Ni8 cuboctahedra. All Nb(3)-Ni(3,3) bond lengths are 2.56 Å. All Nb(3)-Ni(5,5) bond lengths are 2.58 Å. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one Ti(2); one Ti(4); two equivalent Nb(1); two Ni(5,5); two equivalent Ni(7); and four equivalent Ni(1) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with three equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(4)Ti4Ni8 cuboctahedra; corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra;  an edgeedge with one Ti(1)Ni12 cuboctahedra;  an edgeedge with one Nb(3)Ni12 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with two Ni(4,4)Ti4Ni8 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra;  a faceface with one Ti(2)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Nb(1)Ni12 cuboctahedra; faces with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. Both Ni(1)-Ni(5,5) bond lengths are 2.56 Å. Both Ni(1)-Ni(7) bond lengths are 2.58 Å. There are two shorter (2.50 Å) and two longer (2.62 Å) Ni(1)-Ni(1) bond lengths. In the second Ni site, Ni(2) is bonded to two equivalent Ti(3), two equivalent Nb(2), four equivalent Ni(2), and four equivalent Ni(6) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ti(3)Ni12 cuboctahedra; edges with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra; edges with eight equivalent Ni(6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with two equivalent Nb(2)Ni12 cuboctahedra; faces with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(6,6)Ti3NbNi8 cuboctahedra. There are two shorter (2.49 Å) and two longer (2.63 Å) Ni(2)-Ni(2) bond lengths. All Ni(2)-Ni(6) bond lengths are 2.58 Å. In the third Ni site, Ni(2) is bonded to two equivalent Ti(3); two equivalent Nb(2); four Ni(2,2); and four Ni(6,6) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ti(3)Ni12 cuboctahedra; edges with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(4)Ti4Ni8 cuboctahedra; edges with eight Ni(6,6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with two equivalent Nb(2)Ni12 cuboctahedra; faces with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(6,6)Ti3NbNi8 cuboctahedra. There is one shorter (2.49 Å) and one longer (2.63 Å) Ni(2)-Ni(2) bond length. All Ni(2)-Ni(6,6) bond lengths are 2.58 Å. In the fourth Ni site, Ni(3) is bonded to two equivalent Ti(2); two equivalent Nb(3); four Ni(3,3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ti(2)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with eight Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with two equivalent Nb(3)Ni12 cuboctahedra; faces with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra. There are two shorter (2.50 Å) and two longer (2.62 Å) Ni(3)-Ni(3,3) bond lengths. All Ni(3)-Ni(5,5) bond lengths are 2.56 Å. In the fifth Ni site, Ni(4) is bonded to one Ti(3); one Ti(4); two equivalent Ti(1); two equivalent Ni(6); two equivalent Ni(7); and four Ni(4,4) atoms to form distorted NiTi4Ni8 cuboctahedra that share corners with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra;  an edgeedge with one Nb(1)Ni12 cuboctahedra;  an edgeedge with one Nb(2)Ni12 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(6)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Ti(1)Ni12 cuboctahedra; faces with four Ni(4,4)Ti4Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. Both Ni(4)-Ni(6) bond lengths are 2.55 Å. Both Ni(4)-Ni(7) bond lengths are 2.55 Å. There are two shorter (2.49 Å) and two longer (2.63 Å) Ni(4)-Ni(4,4) bond lengths. In the sixth Ni site, Ni(3) is bonded to two equivalent Ti(2); two equivalent Nb(3); four equivalent Ni(3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with six equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ti(2)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; edges with eight Ni(5,5)Ti2Nb2Ni8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with two equivalent Nb(3)Ni12 cuboctahedra; faces with four equivalent Ni(3)Ti2Nb2Ni8 cuboctahedra; and faces with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra. All Ni(3)-Ni(5,5) bond lengths are 2.56 Å. In the seventh Ni site, Ni(4) is bonded to one Ti(3); one Ti(4); two equivalent Ti(1); two Ni(6,6); two equivalent Ni(7); and four equivalent Ni(4) atoms to form distorted NiTi4Ni8 cuboctahedra that share corners with three equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; corners with three equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; corners with six equivalent Ni(4)Ti4Ni8 cuboctahedra;  an edgeedge with one Nb(1)Ni12 cuboctahedra;  an edgeedge with one Nb(2)Ni12 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with two Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(6,6)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four equivalent Ni(4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(3)Ni12 cuboctahedra;  a faceface with one Ti(4)Ni12 cuboctahedra; faces with two equivalent Ti(1)Ni12 cuboctahedra; faces with four equivalent Ni(4)Ti4Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five equivalent Ni(7)Ti3NbNi8 cuboctahedra. Both Ni(4)-Ni(6,6) bond lengths are 2.55 Å. Both Ni(4)-Ni(7) bond lengths are 2.55 Å. In the eighth Ni site, Ni(5) is bonded to two equivalent Ti(2); one Nb(1); one Nb(3); two equivalent Ni(1); two Ni(3,3); and four equivalent Ni(5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Nb(3)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra. All Ni(5)-Ni(5) bond lengths are 2.56 Å. In the ninth Ni site, Ni(6) is bonded to one Ti(1); two equivalent Ti(3); one Nb(2); two Ni(2,2); two Ni(4,4); and four Ni(6,6) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(6,6)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four Ni(2,2)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(6,6)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(2)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with five Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra. There are two shorter (2.55 Å) and two longer (2.57 Å) Ni(6)-Ni(6,6) bond lengths. In the tenth Ni site, Ni(7) is bonded to one Ti(1); two equivalent Ti(4); one Nb(1); two equivalent Ni(1); two Ni(4,4); and four equivalent Ni(7) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with four equivalent Ni(5)Ti2Nb2Ni8 cuboctahedra; corners with four Ni(6,6)Ti3NbNi8 cuboctahedra; corners with six equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(4)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Ni(5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Ni(6)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(4)Ni12 cuboctahedra; faces with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra. There are two shorter (2.54 Å) and two longer (2.57 Å) Ni(7)-Ni(7) bond lengths. In the eleventh Ni site, Ni(5) is bonded to two equivalent Ti(2); one Nb(1); one Nb(3); two equivalent Ni(1); two Ni(3,3); and four Ni(5,5) atoms to form distorted NiTi2Nb2Ni8 cuboctahedra that share corners with two equivalent Ti(2)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(5,5)Ti2Nb2Ni8 cuboctahedra; edges with two equivalent Ti(2)Ni12 cuboctahedra; edges with two equivalent Nb(1)Ni12 cuboctahedra; edges with two equivalent Nb(3)Ni12 cuboctahedra; edges with four equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(3,3)Ti2Nb2Ni8 cuboctahedra; edges with four Ni(5,5)Ti2Nb2Ni8 cuboctahedra;  a faceface with one Nb(1)Ni12 cuboctahedra;  a faceface with one Nb(3)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(2)Ni12 cuboctahedra; faces with five equivalent Ni(1)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(3,3)Ti2Nb2Ni8 cuboctahedra; and faces with five Ni(5,5)Ti2Nb2Ni8 cuboctahedra. Both Ni(5)-Ni(5) bond lengths are 2.56 Å. In the twelfth Ni site, Ni(6) is bonded to one Ti(1); two equivalent Ti(3); one Nb(2); two equivalent Ni(2); two Ni(4,4); and four equivalent Ni(6) atoms to form distorted NiTi3NbNi8 cuboctahedra that share corners with two equivalent Ti(3)Ni12 cuboctahedra; corners with two equivalent Ti(4)Ni12 cuboctahedra; corners with four equivalent Ni(7)Ti3NbNi8 cuboctahedra; corners with ten Ni(6,6)Ti3NbNi8 cuboctahedra; edges with two equivalent Ti(1)Ni12 cuboctahedra; edges with two equivalent Ti(3)Ni12 cuboctahedra; edges with two equivalent Nb(2)Ni12 cuboctahedra; edges with four equivalent Ni(2)Ti2Nb2Ni8 cuboctahedra; edges with four equivalent Ni(6)Ti3NbNi8 cuboctahedra; edges with four Ni(4,4)Ti4Ni8 cuboctahedra;  a faceface with one Ti(1)Ni12 cuboctahedra;  a faceface with one Nb(2)Ni12 cuboctahedra;  a faceface with one Ni(7)Ti3NbNi8 cuboctahedra; faces with two equivalent Ti(3)Ni12 cuboctahedra; faces with five Ni(2,2)Ti2Nb2Ni8 cuboctahedra; faces with five Ni(6,6)Ti3NbNi8 cuboctahedra; and faces with five Ni(4,4)Ti4Ni8 cuboctahedra. The Ni(6)-Ni(4) bond length is 2.55 Å.