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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on P2W by Materials Project

WP2 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. W6+ is bonded to seven P3- atoms to form a mixture of distorted corner, edge, and face-sharing WP7 pentagonal bipyramids. There are five shorter (2.50 Å) and two longer (2.51 Å) W–P bond lengths. There are two inequivalent P3- sites. In the first P3- site, P3- is bonded in a 5-coordinate geometry to four equivalent W6+ and one P3- atom. The P–P bond length is 2.17 Å. In the second P3- site, P3- is bonded in a distorted rectangular see-saw-like geometry to three equivalent W6+ and one P3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on P2W by Materials Project

WP2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. W6+ is bonded in a 8-coordinate geometry to eight P3- atoms. There are a spread of W–P bond distances ranging from 2.48–2.65 Å. There are two inequivalent P3- sites. In the first P3- site, P3- is bonded in a 4-coordinate geometry to three equivalent W6+ and three equivalent P3- atoms. There are one shorter (2.20 Å) and two longer (2.65 Å) P–P bond lengths. In the second P3- site, P3- is bonded in a 5-coordinate geometry to five equivalent W6+ atoms.

36 MATERIALS SCIENCE↗