Sm6Mn23 crystallizes in the cubic Fm-3m space group. Sm(1) is bonded in a 12-coordinate geometry to four equivalent Mn(2), four equivalent Mn(3), and four equivalent Mn(4) atoms. There are four inequivalent Mn sites. In the first Mn site, Mn(4) is bonded to three equivalent Sm(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms to form distorted MnSm3Mn9 cuboctahedra that share corners with six equivalent Mn(4)Sm3Mn9 cuboctahedra, corners with six equivalent Mn(2)Sm4Mn8 cuboctahedra, faces with six equivalent Mn(4)Sm3Mn9 cuboctahedra, and faces with six equivalent Mn(2)Sm4Mn8 cuboctahedra. In the second Mn site, Mn(1) is bonded in a body-centered cubic geometry to eight equivalent Mn(3) atoms. In the third Mn site, Mn(2) is bonded to four equivalent Sm(1), four equivalent Mn(3), and four equivalent Mn(4) atoms to form MnSm4Mn8 cuboctahedra that share corners with four equivalent Mn(2)Sm4Mn8 cuboctahedra, corners with eight equivalent Mn(4)Sm3Mn9 cuboctahedra, faces with eight equivalent Mn(4)Sm3Mn9 cuboctahedra, and faces with eight equivalent Mn(2)Sm4Mn8 cuboctahedra. In the fourth Mn site, Mn(3) is bonded in a 13-coordinate geometry to three equivalent Sm(1), one Mn(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms.
Sm6Mn23 crystallizes in the cubic Fm-3m space group. Sm(1) is bonded in a 12-coordinate geometry to four equivalent Mn(2), four equivalent Mn(3), and four equivalent Mn(4) atoms. All Sm(1)-Mn(2) bond lengths are 3.06 Å. All Sm(1)-Mn(3) bond lengths are 2.94 Å. All Sm(1)-Mn(4) bond lengths are 3.08 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(4) is bonded to three equivalent Sm(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms to form distorted MnSm3Mn9 cuboctahedra that share corners with six equivalent Mn(4)Sm3Mn9 cuboctahedra, corners with six equivalent Mn(2)Sm4Mn8 cuboctahedra, faces with six equivalent Mn(4)Sm3Mn9 cuboctahedra, and faces with six equivalent Mn(2)Sm4Mn8 cuboctahedra. All Mn(4)-Mn(2) bond lengths are 2.47 Å. All Mn(4)-Mn(3) bond lengths are 2.61 Å. All Mn(4)-Mn(4) bond lengths are 2.39 Å. In the second Mn site, Mn(1) is bonded in a body-centered cubic geometry to eight equivalent Mn(3) atoms. All Mn(1)-Mn(3) bond lengths are 2.52 Å. In the third Mn site, Mn(2) is bonded to four equivalent Sm(1), four equivalent Mn(3), and four equivalent Mn(4) atoms to form MnSm4Mn8 cuboctahedra that share corners with four equivalent Mn(2)Sm4Mn8 cuboctahedra, corners with eight equivalent Mn(4)Sm3Mn9 cuboctahedra, faces with eight equivalent Mn(4)Sm3Mn9 cuboctahedra, and faces with eight equivalent Mn(2)Sm4Mn8 cuboctahedra. All Mn(2)-Mn(3) bond lengths are 2.64 Å. In the fourth Mn site, Mn(3) is bonded in a 13-coordinate geometry to three equivalent Sm(1), one Mn(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms. All Mn(3)-Mn(3) bond lengths are 2.91 Å.