Materials Data on Eu2PI by Materials Project
Eu2PI is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Eu2+ is bonded to three equivalent P3- and three equivalent I1- atoms to form a mixture of edge and corner-sharing EuP3I3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Eu–P bond lengths are 2.96 Å. All Eu–I bond lengths are 3.45 Å. P3- is bonded to six equivalent Eu2+ atoms to form PEu6 octahedra that share corners with six equivalent IEu6 octahedra, edges with six equivalent PEu6 octahedra, and edges with six equivalent IEu6 octahedra. The corner-sharing octahedral tilt angles are 12°. I1- is bonded to six equivalent Eu2+ atoms to form distorted IEu6 octahedra that share corners with six equivalent PEu6 octahedra, edges with six equivalent PEu6 octahedra, and edges with six equivalent IEu6 octahedra. The corner-sharing octahedral tilt angles are 12°.