Materials Data on Na3PO4 by Materials Project

Na3PO4 is Enargite structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.26–2.33 Å. In the second Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.31–2.40 Å. In the third Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.26–2.34 Å. In the fourth Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.26–2.34 Å. In the fifth Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.26–2.33 Å. In the sixth Na1+ site, Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with four PO4 tetrahedra and corners with eight NaO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.29–2.39 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with twelve NaO4 tetrahedra. There is two shorter (1.56 Å) and two longer (1.57 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with twelve NaO4 tetrahedra. There is one shorter (1.56 Å) and three longer (1.57 Å) P–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to three Na1+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to three Na1+ and one P5+ atom.