Materials Data on TmP5 by Materials Project
TmP5 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Tm3+ is bonded in a 8-coordinate geometry to eight P+0.60- atoms. There are a spread of Tm–P bond distances ranging from 2.89–3.00 Å. There are three inequivalent P+0.60- sites. In the first P+0.60- site, P+0.60- is bonded to two equivalent Tm3+ and two P+0.60- atoms to form a mixture of edge and corner-sharing PTm2P2 tetrahedra. There are one shorter (2.17 Å) and one longer (2.22 Å) P–P bond lengths. In the second P+0.60- site, P+0.60- is bonded to two equivalent Tm3+ and two equivalent P+0.60- atoms to form distorted corner-sharing PTm2P2 tetrahedra. Both P–P bond lengths are 2.21 Å. In the third P+0.60- site, P+0.60- is bonded to one Tm3+ and three P+0.60- atoms to form distorted PTmP3 tetrahedra that share corners with nine PTm2P2 tetrahedra and an edgeedge with one PTmP3 tetrahedra. The P–P bond length is 2.19 Å.