Materials Data on Eu3P4 by Materials Project

Abstract

Eu3P4 crystallizes in the orthorhombic Fdd2 space group. The structure is three-dimensional. there are two inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded to eight P+1.50- atoms to form EuP8 hexagonal bipyramids that share corners with four equivalent EuP8 hexagonal bipyramids, corners with four equivalent PEu6P pentagonal bipyramids, and edges with two equivalent EuP8 hexagonal bipyramids. There are a spread of Eu–P bond distances ranging from 2.99–3.14 Å. In the second Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight P+1.50- atoms. There are a spread of Eu–P bond distances ranging from 3.02–3.12 Å. There are two inequivalent P+1.50- sites. In the first P+1.50- site, P+1.50- is bonded to six Eu2+ and one P+1.50- atom to form distorted PEu6P pentagonal bipyramids that share corners with two equivalent EuP8 hexagonal bipyramids, corners with six equivalent PEu6P pentagonal bipyramids, and edges with six equivalent PEu6P pentagonal bipyramids. The P–P bond length is 2.26 Å. In the second P+1.50- site, P+1.50- is bonded in a 8-coordinate geometry to six Eu2+ and two P+1.50- atoms. The P–P bond length is 2.37 Å.