NpCd11 crystallizes in the cubic Pm-3m space group. Np(1) is bonded in a 20-coordinate geometry to four Cd(4,4,4); eight equivalent Cd(2); and eight equivalent Cd(3) atoms. There are six inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a cuboctahedral geometry to twelve Cd(4,4,4) atoms. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to three equivalent Np(1), three equivalent Cd(2), and three equivalent Cd(3) atoms. In the third Cd site, Cd(3) is bonded in a distorted q6 geometry to two equivalent Np(1), two equivalent Cd(2), two equivalent Cd(3), and four equivalent Cd(4) atoms. In the fourth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms. In the fifth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms. In the sixth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms.
NpCd11 crystallizes in the cubic Pm-3m space group. Np(1) is bonded in a 20-coordinate geometry to four Cd(4,4,4); eight equivalent Cd(2); and eight equivalent Cd(3) atoms. All Np(1)-Cd(4,4,4) bond lengths are 3.55 Å. All Np(1)-Cd(2) bond lengths are 3.86 Å. All Np(1)-Cd(3) bond lengths are 3.57 Å. There are six inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a cuboctahedral geometry to twelve Cd(4,4,4) atoms. All Cd(1)-Cd(4,4,4) bond lengths are 3.13 Å. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to three equivalent Np(1), three equivalent Cd(2), and three equivalent Cd(3) atoms. All Cd(2)-Cd(2) bond lengths are 2.94 Å. All Cd(2)-Cd(3) bond lengths are 2.93 Å. In the third Cd site, Cd(3) is bonded in a distorted q6 geometry to two equivalent Np(1), two equivalent Cd(2), two equivalent Cd(3), and four equivalent Cd(4) atoms. Both Cd(3)-Cd(3) bond lengths are 2.93 Å. All Cd(3)-Cd(4) bond lengths are 3.00 Å. In the fourth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms. All Cd(4)-Cd(4) bond lengths are 3.13 Å. In the fifth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms. All Cd(4)-Cd(3) bond lengths are 3.00 Å. All Cd(4)-Cd(4) bond lengths are 3.13 Å. In the sixth Cd site, Cd(4) is bonded in a 10-coordinate geometry to one Np(1), one Cd(1), four equivalent Cd(3), and four equivalent Cd(4) atoms. All Cd(4)-Cd(3) bond lengths are 3.00 Å. All Cd(4)-Cd(4) bond lengths are 3.13 Å.