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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Te2W(NO4)2 by Materials Project

(WTe2O7)2N2(NO)2 crystallizes in the monoclinic P2_1 space group. The structure is two-dimensional and consists of two ammonia molecules; two nitroxyl molecules; and one WTe2O7 sheet oriented in the (1, 0, 0) direction. In the WTe2O7 sheet, W6+ is bonded to six O2- atoms to form distorted WO6 octahedra that share a cornercorner with one TeO4 trigonal pyramid and an edgeedge with one TeO4 trigonal pyramid. There are a spread of W–O bond distances ranging from 1.76–2.22 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–1.97 Å. In the second Te4+ site, Te4+ is bonded to four O2- atoms to form distorted TeO4 trigonal pyramids that share a cornercorner with one WO6 octahedra and an edgeedge with one WO6 octahedra. The corner-sharing octahedral tilt angles are 34°. There are a spread of Te–O bond distances ranging from 1.89–2.24 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one W6+ and one Te4+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one W6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one W6+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one W6+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one W6+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one W6+ and one Te4+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two Te4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te2W2N2O15 by Materials Project

(WTeO6)4(N2)2(O2)3 crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional and consists of four ammonia molecules, two trioxidane molecules, and one WTeO6 framework. In the WTeO6 framework, W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with two equivalent WO6 octahedra and corners with four equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 34–39°. There is two shorter (1.93 Å) and four longer (1.95 Å) W–O bond length. Te4+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with two equivalent TeO6 octahedra and corners with four equivalent WO6 octahedra. The corner-sharing octahedra tilt angles range from 38–43°. There are a spread of Te–O bond distances ranging from 1.94–1.97 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Te4+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one W6+ and one Te4+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Te4+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent W6+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one W6+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent W6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te2W(NO4)2 by Materials Project

(WTe2O7)2N2(NO)2 crystallizes in the monoclinic P2_1 space group. The structure is two-dimensional and consists of two ammonia molecules; two nitroxyl molecules; and one WTe2O7 sheet oriented in the (1, 0, 0) direction. In the WTe2O7 sheet, W6+ is bonded to six O2- atoms to form distorted WO6 octahedra that share a cornercorner with one TeO4 trigonal pyramid and an edgeedge with one TeO4 trigonal pyramid. There are a spread of W–O bond distances ranging from 1.76–2.23 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.91–1.96 Å. In the second Te4+ site, Te4+ is bonded to four O2- atoms to form TeO4 trigonal pyramids that share a cornercorner with one WO6 octahedra and an edgeedge with one WO6 octahedra. The corner-sharing octahedral tilt angles are 37°. There are a spread of Te–O bond distances ranging from 1.89–2.19 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one W6+ and one Te4+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one W6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one W6+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one W6+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one W6+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one W6+ and one Te4+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two Te4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te2W2N2O by Materials Project

W2N2Te2O crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional. W6+ is bonded in a distorted bent 120 degrees geometry to one N3-, two equivalent Te2-, and one O2- atom. The W–N bond length is 1.72 Å. Both W–Te bond lengths are 2.83 Å. The W–O bond length is 1.95 Å. N3- is bonded in a single-bond geometry to one W6+ and four equivalent Te2- atoms. There are two shorter (3.35 Å) and two longer (3.97 Å) N–Te bond lengths. Te2- is bonded in a 4-coordinate geometry to two equivalent W6+, four equivalent N3-, one Te2-, and one O2- atom. The Te–Te bond length is 2.85 Å. The Te–O bond length is 3.68 Å. O2- is bonded in a bent 150 degrees geometry to two equivalent W6+ and two equivalent Te2- atoms.

36 MATERIALS SCIENCE↗