Ce6MnSb15 crystallizes in the monoclinic Cm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 10-coordinate geometry to one Sb(5), one Sb(6), one Sb(7), one Sb(8), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(9) atoms. In the second Ce site, Ce(2) is bonded in a 10-coordinate geometry to one Mn(1), one Sb(10), one Sb(3), one Sb(7), two equivalent Sb(1), two equivalent Sb(8), and two equivalent Sb(9) atoms. In the third Ce site, Ce(3) is bonded in a 9-coordinate geometry to one Sb(10), one Sb(4), one Sb(8), two equivalent Sb(2), two equivalent Sb(7), and two equivalent Sb(9) atoms. Mn(1) is bonded in a distorted body-centered cubic geometry to two equivalent Ce(2), two equivalent Sb(1), two equivalent Sb(3), and two equivalent Sb(5) atoms. There are ten inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 6-coordinate geometry to four equivalent Ce(2) and two equivalent Mn(1) atoms. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to four equivalent Ce(3) and two equivalent Sb(10) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Ce(2), two equivalent Ce(1), one Mn(1), two equivalent Sb(5), and two equivalent Sb(8) atoms. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Ce(3), two equivalent Ce(1), two equivalent Sb(6), and two equivalent Sb(7) atoms. In the fifth Sb site, Sb(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Mn(1), one Sb(6), and four equivalent Sb(3) atoms. In the sixth Sb site, Sb(6) is bonded in a 7-coordinate geometry to two equivalent Ce(1), one Sb(5), and four equivalent Sb(4) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one Ce(1), one Ce(2), two equivalent Ce(3), two equivalent Sb(4), and two equivalent Sb(8) atoms. In the eighth Sb site, Sb(8) is bonded in a 8-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), two equivalent Sb(3), and two equivalent Sb(7) atoms. In the ninth Sb site, Sb(9) is bonded to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ce(3) atoms to form distorted face-sharing SbCe6 pentagonal pyramids. In the tenth Sb site, Sb(10) is bonded in a 4-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), and two equivalent Sb(2) atoms.
Ce6MnSb15 crystallizes in the monoclinic Cm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 10-coordinate geometry to one Sb(5), one Sb(6), one Sb(7), one Sb(8), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(9) atoms. The Ce(1)-Sb(5) bond length is 3.75 Å. The Ce(1)-Sb(6) bond length is 3.71 Å. The Ce(1)-Sb(7) bond length is 3.22 Å. The Ce(1)-Sb(8) bond length is 3.32 Å. There is one shorter (3.22 Å) and one longer (3.23 Å) Ce(1)-Sb(3) bond length. Both Ce(1)-Sb(4) bond lengths are 3.32 Å. There is one shorter (3.26 Å) and one longer (3.27 Å) Ce(1)-Sb(9) bond length. In the second Ce site, Ce(2) is bonded in a 10-coordinate geometry to one Mn(1), one Sb(10), one Sb(3), one Sb(7), two equivalent Sb(1), two equivalent Sb(8), and two equivalent Sb(9) atoms. The Ce(2)-Mn(1) bond length is 3.27 Å. The Ce(2)-Sb(10) bond length is 3.37 Å. The Ce(2)-Sb(3) bond length is 3.35 Å. The Ce(2)-Sb(7) bond length is 3.43 Å. There is one shorter (3.35 Å) and one longer (3.36 Å) Ce(2)-Sb(1) bond length. There is one shorter (3.37 Å) and one longer (3.39 Å) Ce(2)-Sb(8) bond length. There is one shorter (3.29 Å) and one longer (3.30 Å) Ce(2)-Sb(9) bond length. In the third Ce site, Ce(3) is bonded in a 9-coordinate geometry to one Sb(10), one Sb(4), one Sb(8), two equivalent Sb(2), two equivalent Sb(7), and two equivalent Sb(9) atoms. The Ce(3)-Sb(10) bond length is 3.26 Å. The Ce(3)-Sb(4) bond length is 3.27 Å. The Ce(3)-Sb(8) bond length is 3.35 Å. There is one shorter (3.34 Å) and one longer (3.38 Å) Ce(3)-Sb(2) bond length. There is one shorter (3.33 Å) and one longer (3.36 Å) Ce(3)-Sb(7) bond length. There is one shorter (3.28 Å) and one longer (3.30 Å) Ce(3)-Sb(9) bond length. Mn(1) is bonded in a distorted body-centered cubic geometry to two equivalent Ce(2), two equivalent Sb(1), two equivalent Sb(3), and two equivalent Sb(5) atoms. There is one shorter (2.77 Å) and one longer (2.78 Å) Mn(1)-Sb(1) bond length. Both Mn(1)-Sb(3) bond lengths are 2.61 Å. There is one shorter (2.85 Å) and one longer (2.86 Å) Mn(1)-Sb(5) bond length. There are ten inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 6-coordinate geometry to four equivalent Ce(2) and two equivalent Mn(1) atoms. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to four equivalent Ce(3) and two equivalent Sb(10) atoms. There is one shorter (3.04 Å) and one longer (3.19 Å) Sb(2)-Sb(10) bond length. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Ce(2), two equivalent Ce(1), one Mn(1), two equivalent Sb(5), and two equivalent Sb(8) atoms. There is one shorter (3.18 Å) and one longer (3.20 Å) Sb(3)-Sb(5) bond length. There is one shorter (3.00 Å) and one longer (3.01 Å) Sb(3)-Sb(8) bond length. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Ce(3), two equivalent Ce(1), two equivalent Sb(6), and two equivalent Sb(7) atoms. There is one shorter (3.07 Å) and one longer (3.08 Å) Sb(4)-Sb(6) bond length. Both Sb(4)-Sb(7) bond lengths are 3.04 Å. In the fifth Sb site, Sb(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Mn(1), one Sb(6), and four equivalent Sb(3) atoms. The Sb(5)-Sb(6) bond length is 2.95 Å. In the sixth Sb site, Sb(6) is bonded in a 7-coordinate geometry to two equivalent Ce(1), one Sb(5), and four equivalent Sb(4) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one Ce(1), one Ce(2), two equivalent Ce(3), two equivalent Sb(4), and two equivalent Sb(8) atoms. Both Sb(7)-Sb(8) bond lengths are 3.02 Å. In the eighth Sb site, Sb(8) is bonded in a 8-coordinate geometry to one Ce(1), one Ce(3), two equivalent Ce(2), two equivalent Sb(3), and two equivalent Sb(7) atoms. In the ninth Sb site, Sb(9) is bonded to two equivalent Ce(1), two equivalent Ce(2), and two equivalent Ce(3) atoms to form distorted face-sharing SbCe6 pentagonal pyramids. In the tenth Sb site, Sb(10) is bonded in a 4-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), and two equivalent Sb(2) atoms.