DOI: 10.17188/1726435
title: Materials Data on Na8Te4W7O36 by Materials Project

description: Na8W7Te4O36 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are eight inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 1-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.22–2.92 Å. In the second Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.30–2.71 Å. In the third Na1+ site, Na1+ is bonded in a 2-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.27–3.01 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.50–2.81 Å. In the fifth Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–3.00 Å. In the sixth Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–3.01 Å. In the seventh Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.44–2.82 Å. In the eighth Na1+ site, Na1+ is bonded to seven O2- atoms to form distorted NaO7 pentagonal bipyramids that share corners with three WO6 octahedra and edges with two WO6 octahedra. The corner-sharing octahedra tilt angles range from 27–45°. There are a spread of Na–O bond distances ranging from 2.24–2.73 Å. There are seven inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to six O2- atoms to form distorted WO6 octahedra that share corners with two WO6 octahedra and a cornercorner with one NaO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 26–39°. There are a spread of W–O bond distances ranging from 1.78–2.22 Å. In the second W6+ site, W6+ is bonded to six O2- atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedra tilt angles range from 22–41°. There are a spread of W–O bond distances ranging from 1.80–2.13 Å. In the third W6+ site, W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with two equivalent WO6 octahedra, a cornercorner with one NaO7 pentagonal bipyramid, a cornercorner with one TeO5 trigonal bipyramid, and an edgeedge with one NaO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 27–46°. There are a spread of W–O bond distances ranging from 1.80–2.17 Å. In the fourth W6+ site, W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with three WO6 octahedra, a cornercorner with one NaO7 pentagonal bipyramid, a cornercorner with one TeO5 trigonal bipyramid, and an edgeedge with one NaO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 26–46°. There are a spread of W–O bond distances ranging from 1.79–2.16 Å. In the fifth W6+ site, W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with three WO6 octahedra and a cornercorner with one TeO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 26–40°. There are a spread of W–O bond distances ranging from 1.80–2.09 Å. In the sixth W6+ site, W6+ is bonded to six O2- atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedra tilt angles range from 22–41°. There are a spread of W–O bond distances ranging from 1.78–2.20 Å. In the seventh W6+ site, W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with three WO6 octahedra and a cornercorner with one TeO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 24–40°. There are a spread of W–O bond distances ranging from 1.79–2.10 Å. There are four inequivalent Te+5.50+ sites. In the first Te+5.50+ site, Te+5.50+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.84–2.74 Å. In the second Te+5.50+ site, Te+5.50+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–1.93 Å. In the third Te+5.50+ site, Te+5.50+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.90 Å) and two longer (1.91 Å) Te–O bond length. In the fourth Te+5.50+ site, Te+5.50+ is bonded to five O2- atoms to form TeO5 trigonal bipyramids that share corners with four WO6 octahedra. The corner-sharing octahedra tilt angles range from 33–55°. There are a spread of Te–O bond distances ranging from 1.82–2.00 Å. There are thirty-six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Na1+ and one W6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one W6+, and one Te+5.50+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+ and two W6+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one W6+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two W6+ atoms. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one W6+, and one Te+5.50+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one W6+ atom. In the tenth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two Na1+ and one Te+5.50+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Na1+ and one O2- atom. The O–O bond length is 1.23 Å. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one W6+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one W6+ and one Te+5.50+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one W6+, and one Te+5.50+ atom. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one W6+, and one Te+5.50+ atom. In the sixteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+ and two W6+ atoms. In the seventeenth O2- site, O2- is bonded in a bent 150 degrees geometry to two W6+ atoms. In the eighteenth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two Na1+ and one Te+5.50+ atom. In the nineteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and two W6+ atoms. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to two W6+ atoms. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the twenty-second O2- site, O2- is bonded to three Na1+ and one W6+ atom to form distorted edge-sharing ONa3W tetrahedra. In the twenty-third O2- site, O2- is bonded in a 4-coordinate geometry to three Na1+ and one W6+ atom. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the twenty-fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two W6+ atoms. In the twenty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the twenty-seventh O2- site, O2- is bonded to three Na1+ and one W6+ atom to form distorted edge-sharing ONa3W trigonal pyramids. In the twenty-eighth O2- site, O2- is bonded in a 2-coordinate geometry to two Na1+ and one W6+ atom. In the twenty-ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the thirtieth O2- site, O2- is bonded in a single-bond geometry to one O2- atom. In the thirty-first O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the thirty-second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Na1+, one W6+, and one Te+5.50+ atom. In the thirty-third O2- site, O2- is bonded in a bent 150 degrees geometry to two W6+ atoms. In the thirty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+ and two W6+ atoms. In the thirty-fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+ and two W6+ atoms. In the thirty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Na1+ and one W6+ atom.