Materials Data on SmThB12 by Materials Project
ThSmB12 is Calcium hexaboride-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Th4+ is bonded in a 1-coordinate geometry to twenty-four equivalent B+0.50- atoms. All Th–B bond lengths are 3.02 Å. Sm2+ is bonded in a 1-coordinate geometry to twenty-four equivalent B+0.50- atoms. All Sm–B bond lengths are 3.02 Å. B+0.50- is bonded in a 1-coordinate geometry to two equivalent Th4+, two equivalent Sm2+, and five equivalent B+0.50- atoms. There is one shorter (1.63 Å) and four longer (1.76 Å) B–B bond length.
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