CsMg14Bi crystallizes in the orthorhombic Amm2 space group. Cs(1) is bonded to two equivalent Mg(6); four equivalent Mg(3); four Mg(5,5); and two equivalent Bi(1) atoms to form CsMg10Bi2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with eight Mg(4,4,4,4)Mg12 cuboctahedra; edges with two equivalent Bi(1)Cs2Mg10 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; and faces with two equivalent Bi(1)Cs2Mg10 cuboctahedra. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2); two equivalent Mg(6); four Mg(4,4,4,4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra; faces with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with four Mg(4,4,4,4)Mg12 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1); two equivalent Mg(7); four Mg(4,4,4,4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with six equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Bi(1)Cs2Mg10 cuboctahedra; faces with four Mg(4,4,4,4)Mg12 cuboctahedra; and faces with six equivalent Mg(6)CsMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Cs(1); two Mg(5,5); two equivalent Mg(6); and two equivalent Bi(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1); two equivalent Mg(2); two equivalent Mg(4); two Mg(5,5); two equivalent Mg(6); and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. In the sixth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Cs(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom. In the seventh Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Cs(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom. In the eighth Mg site, Mg(6) is bonded to one Cs(1); one Mg(1); two equivalent Mg(3); two Mg(4,4); two equivalent Mg(7); and four Mg(5,5) atoms to form distorted MgCsMg11 cuboctahedra that share corners with six equivalent Mg(6)CsMg11 cuboctahedra; edges with two equivalent Cs(1)Mg10Bi2 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra;  a faceface with one Cs(1)Mg10Bi2 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two Mg(4,4)Mg12 cuboctahedra; faces with three equivalent Mg(2)Mg12 cuboctahedra; and faces with three equivalent Bi(1)Cs2Mg10 cuboctahedra. In the ninth Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2); two Mg(4,4); two equivalent Mg(6); four Mg(5,5); and one Bi(1) atom. In the tenth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. In the eleventh Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. Bi(1) is bonded to two equivalent Cs(1); two equivalent Mg(7); four equivalent Mg(3); and four Mg(5,5) atoms to form BiCs2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra; corners with six equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with eight Mg(4,4,4,4)Mg12 cuboctahedra; edges with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with six equivalent Mg(6)CsMg11 cuboctahedra.
CsMg14Bi crystallizes in the orthorhombic Amm2 space group. Cs(1) is bonded to two equivalent Mg(6); four equivalent Mg(3); four Mg(5,5); and two equivalent Bi(1) atoms to form CsMg10Bi2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with eight Mg(4,4,4,4)Mg12 cuboctahedra; edges with two equivalent Bi(1)Cs2Mg10 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; and faces with two equivalent Bi(1)Cs2Mg10 cuboctahedra. Both Cs(1)-Mg(6) bond lengths are 3.52 Å. There are two shorter (3.34 Å) and two longer (3.35 Å) Cs(1)-Mg(3) bond lengths. All Cs(1)-Mg(5,5) bond lengths are 3.51 Å. Both Cs(1)-Bi(1) bond lengths are 3.39 Å. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2); two equivalent Mg(6); four Mg(4,4,4,4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra; faces with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with four Mg(4,4,4,4)Mg12 cuboctahedra. Both Mg(1)-Mg(2) bond lengths are 3.39 Å. Both Mg(1)-Mg(6) bond lengths are 3.18 Å. There are two shorter (3.33 Å) and two longer (3.35 Å) Mg(1)-Mg(4,4,4,4) bond lengths. All Mg(1)-Mg(5,5) bond lengths are 3.18 Å. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1); two equivalent Mg(7); four Mg(4,4,4,4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with six equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Bi(1)Cs2Mg10 cuboctahedra; faces with four Mg(4,4,4,4)Mg12 cuboctahedra; and faces with six equivalent Mg(6)CsMg11 cuboctahedra. Both Mg(2)-Mg(7) bond lengths are 3.32 Å. There are two shorter (3.26 Å) and two longer (3.42 Å) Mg(2)-Mg(4,4,4,4) bond lengths. All Mg(2)-Mg(5,5) bond lengths are 3.12 Å. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Cs(1); two Mg(5,5); two equivalent Mg(6); and two equivalent Bi(1) atoms. Both Mg(3)-Mg(5,5) bond lengths are 3.44 Å. Both Mg(3)-Mg(6) bond lengths are 3.41 Å. There is one shorter (3.21 Å) and one longer (3.47 Å) Mg(3)-Bi(1) bond length. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1); two equivalent Mg(2); two equivalent Mg(4); two Mg(5,5); two equivalent Mg(6); and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. There is one shorter (3.33 Å) and one longer (3.46 Å) Mg(4)-Mg(4) bond length. Both Mg(4)-Mg(5,5) bond lengths are 3.12 Å. Both Mg(4)-Mg(6) bond lengths are 3.13 Å. Both Mg(4)-Mg(7) bond lengths are 3.30 Å. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. There is one shorter (3.33 Å) and one longer (3.46 Å) Mg(4)-Mg(4) bond length. Both Mg(4)-Mg(5) bond lengths are 3.12 Å. Both Mg(4)-Mg(6) bond lengths are 3.13 Å. Both Mg(4)-Mg(7) bond lengths are 3.30 Å. In the sixth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Cs(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom. There is one shorter (3.26 Å) and one longer (3.52 Å) Mg(5)-Mg(5) bond length. There is one shorter (3.21 Å) and one longer (3.48 Å) Mg(5)-Mg(6) bond length. There is one shorter (3.33 Å) and one longer (3.38 Å) Mg(5)-Mg(7) bond length. The Mg(5)-Bi(1) bond length is 3.42 Å. In the seventh Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Cs(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Bi(1) atom. There is one shorter (3.26 Å) and one longer (3.52 Å) Mg(5)-Mg(5) bond length. There is one shorter (3.21 Å) and one longer (3.48 Å) Mg(5)-Mg(6) bond length. There is one shorter (3.33 Å) and one longer (3.38 Å) Mg(5)-Mg(7) bond length. The Mg(5)-Bi(1) bond length is 3.42 Å. In the eighth Mg site, Mg(6) is bonded to one Cs(1); one Mg(1); two equivalent Mg(3); two Mg(4,4); two equivalent Mg(7); and four Mg(5,5) atoms to form distorted MgCsMg11 cuboctahedra that share corners with six equivalent Mg(6)CsMg11 cuboctahedra; edges with two equivalent Cs(1)Mg10Bi2 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four Mg(4,4,4,4)Mg12 cuboctahedra;  a faceface with one Cs(1)Mg10Bi2 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two Mg(4,4)Mg12 cuboctahedra; faces with three equivalent Mg(2)Mg12 cuboctahedra; and faces with three equivalent Bi(1)Cs2Mg10 cuboctahedra. The Mg(6)-Mg(4) bond length is 3.13 Å. Both Mg(6)-Mg(7) bond lengths are 3.40 Å. In the ninth Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2); two Mg(4,4); two equivalent Mg(6); four Mg(5,5); and one Bi(1) atom. The Mg(7)-Mg(4) bond length is 3.30 Å. The Mg(7)-Bi(1) bond length is 3.34 Å. In the tenth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. Both Mg(4)-Mg(5) bond lengths are 3.12 Å. Both Mg(4)-Mg(6) bond lengths are 3.13 Å. Both Mg(4)-Mg(7) bond lengths are 3.30 Å. In the eleventh Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Cs(1)Mg10Bi2 cuboctahedra; corners with four equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with six Mg(4,4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(6)CsMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with two equivalent Mg(4)Mg12 cuboctahedra. Both Mg(4)-Mg(5) bond lengths are 3.12 Å. Bi(1) is bonded to two equivalent Cs(1); two equivalent Mg(7); four equivalent Mg(3); and four Mg(5,5) atoms to form BiCs2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra; corners with six equivalent Bi(1)Cs2Mg10 cuboctahedra; corners with eight Mg(4,4,4,4)Mg12 cuboctahedra; edges with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Cs(1)Mg10Bi2 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; and faces with six equivalent Mg(6)CsMg11 cuboctahedra.