Materials Data on Na2WO12 by Materials Project
Na2WO12 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Na–O bond distances ranging from 2.34–2.51 Å. In the second Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.27–2.65 Å. W is bonded in a distorted hexagonal bipyramidal geometry to eight O atoms. There are a spread of W–O bond distances ranging from 1.98–2.03 Å. There are twelve inequivalent O sites. In the first O site, O is bonded in a distorted T-shaped geometry to two Na and one O atom. The O–O bond length is 1.28 Å. In the second O site, O is bonded in a 3-coordinate geometry to two Na and one O atom. In the third O site, O is bonded in a 2-coordinate geometry to one Na, one W, and one O atom. The O–O bond length is 1.48 Å. In the fourth O site, O is bonded in a 1-coordinate geometry to one W and one O atom. The O–O bond length is 1.45 Å. In the fifth O site, O is bonded in a 4-coordinate geometry to two equivalent Na, one W, and one O atom. The O–O bond length is 1.52 Å. In the sixth O site, O is bonded in a 1-coordinate geometry to one W and one O atom. In the seventh O site, O is bonded in a 3-coordinate geometry to one Na, one W, and one O atom. The O–O bond length is 1.51 Å. In the eighth O site, O is bonded in a 1-coordinate geometry to one W and one O atom. In the ninth O site, O is bonded in an L-shaped geometry to one Na and one O atom. The O–O bond length is 1.25 Å. In the tenth O site, O is bonded in a distorted water-like geometry to one Na and one O atom. In the eleventh O site, O is bonded in a 1-coordinate geometry to one Na, one W, and one O atom. In the twelfth O site, O is bonded in a 4-coordinate geometry to two equivalent Na, one W, and one O atom.