Materials Data on Cu3PSe4 by Materials Project
Cu3PSe4 is Enargite structured and crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. there are two inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded to four Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent PSe4 tetrahedra and corners with eight CuSe4 tetrahedra. There are a spread of Cu–Se bond distances ranging from 2.40–2.43 Å. In the second Cu1+ site, Cu1+ is bonded to four Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent PSe4 tetrahedra and corners with eight equivalent CuSe4 tetrahedra. There are a spread of Cu–Se bond distances ranging from 2.41–2.45 Å. P5+ is bonded to four Se2- atoms to form PSe4 tetrahedra that share corners with twelve CuSe4 tetrahedra. There are one shorter (2.29 Å) and three longer (2.31 Å) P–Se bond lengths. There are three inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to three Cu1+ and one P5+ atom to form corner-sharing SeCu3P tetrahedra. In the second Se2- site, Se2- is bonded to three Cu1+ and one P5+ atom to form corner-sharing SeCu3P tetrahedra. In the third Se2- site, Se2- is bonded to three Cu1+ and one P5+ atom to form corner-sharing SeCu3P tetrahedra.