Tm6Mn23 crystallizes in the cubic Fm-3m space group. Tm(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 in a distorted q6 geometry to three equivalent Tm(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms. 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 Tm(1), four equivalent Mn(3), and four equivalent Mn(4) atoms to form a mixture of corner and face-sharing MnTm4Mn8 cuboctahedra. In the fourth Mn site, Mn(3) is bonded in a 13-coordinate geometry to three equivalent Tm(1), one Mn(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms.
Tm6Mn23 crystallizes in the cubic Fm-3m space group. Tm(1) is bonded in a 12-coordinate geometry to four equivalent Mn(2), four equivalent Mn(3), and four equivalent Mn(4) atoms. All Tm(1)-Mn(2) bond lengths are 3.02 Å. All Tm(1)-Mn(3) bond lengths are 2.91 Å. All Tm(1)-Mn(4) bond lengths are 2.99 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(4) is bonded in a distorted q6 geometry to three equivalent Tm(1), three equivalent Mn(2), three equivalent Mn(3), and three equivalent Mn(4) atoms. All Mn(4)-Mn(2) bond lengths are 2.44 Å. All Mn(4)-Mn(3) bond lengths are 2.58 Å. All Mn(4)-Mn(4) bond lengths are 2.46 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 2.50 Å. In the third Mn site, Mn(2) is bonded to four equivalent Tm(1), four equivalent Mn(3), and four equivalent Mn(4) atoms to form a mixture of corner and face-sharing MnTm4Mn8 cuboctahedra. All Mn(2)-Mn(3) bond lengths are 2.60 Å. In the fourth Mn site, Mn(3) is bonded in a 13-coordinate geometry to three equivalent Tm(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 2.89 Å.