YbTmB12 is Calcium hexaboride-derived structured and crystallizes in the cubic Fm-3m space group. Yb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent B(1) atoms. Tm(1) is bonded in a 24-coordinate geometry to twenty-four equivalent B(1) atoms. B(1) is bonded in a 5-coordinate geometry to two equivalent Yb(1), two equivalent Tm(1), and five equivalent B(1) atoms.
YbTmB12 is Calcium hexaboride-derived structured and crystallizes in the cubic Fm-3m space group. Yb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent B(1) atoms. All Yb(1)-B(1) bond lengths are 3.01 Å. Tm(1) is bonded in a 24-coordinate geometry to twenty-four equivalent B(1) atoms. All Tm(1)-B(1) bond lengths are 3.01 Å. B(1) is bonded in a 5-coordinate geometry to two equivalent Yb(1), two equivalent Tm(1), and five equivalent B(1) atoms. There is one shorter (1.64 Å) and four longer (1.74 Å) B(1)-B(1) bond lengths.