Materials Data on P2Rh by Materials Project
RhP2 is Spinel-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Rh4+ is bonded to six P2- atoms to form RhP6 octahedra that share corners with eight equivalent RhP6 octahedra, corners with six PPRh3 tetrahedra, and edges with two equivalent RhP6 octahedra. The corner-sharing octahedra tilt angles range from 56–61°. There are a spread of Rh–P bond distances ranging from 2.34–2.43 Å. There are two inequivalent P2- sites. In the first P2- site, P2- is bonded to three equivalent Rh4+ and one P2- atom to form PPRh3 tetrahedra that share corners with three equivalent RhP6 octahedra, corners with thirteen PPRh3 tetrahedra, and an edgeedge with one PPRh3 tetrahedra. The corner-sharing octahedra tilt angles range from 68–70°. The P–P bond length is 2.23 Å. In the second P2- site, P2- is bonded to three equivalent Rh4+ and one P2- atom to form PPRh3 tetrahedra that share corners with three equivalent RhP6 octahedra, corners with thirteen PPRh3 tetrahedra, and an edgeedge with one PPRh3 tetrahedra. The corner-sharing octahedra tilt angles range from 72–77°.