ErH3 crystallizes in the trigonal P-3c1 space group. Er(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(2), 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 Er(1) atoms. In the second H site, H(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms. In the third H site, H(3) is bonded in a trigonal planar geometry to three equivalent Er(1) atoms.
ErH3 crystallizes in the trigonal P-3c1 space group. Er(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(2), and eight equivalent H(1) atoms. The Er(1)-H(3) bond length is 2.10 Å. Both Er(1)-H(2) bond lengths are 2.10 Å. There are a spread of Er(1)-H(1) bond distances ranging from 2.20-2.47 Å. There are three inequivalent H sites. In the first H site, H(2) is bonded in a trigonal planar geometry to three equivalent Er(1) atoms. In the second H site, H(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms. In the third H site, H(3) is bonded in a trigonal planar geometry to three equivalent Er(1) atoms.