SmH3 crystallizes in the trigonal P-3c1 space group. Sm(1) is bonded in a 11-coordinate geometry to one H(2), two equivalent H(3), and eight equivalent H(1) atoms. There are three inequivalent H sites. In the first H site, H(2) is bonded in a trigonal planar geometry to three equivalent Sm(1) atoms. In the second H site, H(3) is bonded in a trigonal planar geometry to three equivalent Sm(1) atoms. In the third H site, H(1) is bonded to four equivalent Sm(1) atoms to form a mixture of distorted edge, face, and corner-sharing HSm4 tetrahedra.
SmH3 crystallizes in the trigonal P-3c1 space group. Sm(1) is bonded in a 11-coordinate geometry to one H(2), two equivalent H(3), and eight equivalent H(1) atoms. The Sm(1)-H(2) bond length is 2.20 Å. Both Sm(1)-H(3) bond lengths are 2.21 Å. There are a spread of Sm(1)-H(1) bond distances ranging from 2.32-2.58 Å. There are three inequivalent H sites. In the first H site, H(2) is bonded in a trigonal planar geometry to three equivalent Sm(1) atoms. In the second H site, H(3) is bonded in a trigonal planar geometry to three equivalent Sm(1) atoms. In the third H site, H(1) is bonded to four equivalent Sm(1) atoms to form a mixture of distorted edge, face, and corner-sharing HSm4 tetrahedra.