Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “TeO6”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 307 records · Page 17

Materials Data on Ba2ZnTeO6 by Materials Project

Ba2ZnTeO6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share corners with twelve equivalent BaO12 cuboctahedra, faces with six equivalent BaO12 cuboctahedra, faces with four equivalent ZnO6 octahedra, and faces with four equivalent TeO6 octahedra. All Ba–O bond lengths are 2.92 Å. Zn2+ is bonded to six equivalent O2- atoms to form ZnO6 octahedra that share corners with six equivalent TeO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Zn–O bond lengths are 2.16 Å. Te6+ is bonded to six equivalent O2- atoms to form TeO6 octahedra that share corners with six equivalent ZnO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Te–O bond lengths are 1.97 Å. O2- is bonded in a distorted linear geometry to four equivalent Ba2+, one Zn2+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on CsTeO3 by Materials Project

CsTeO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Cs is bonded to twelve equivalent O atoms to form CsO12 cuboctahedra that share corners with twelve equivalent CsO12 cuboctahedra, faces with six equivalent CsO12 cuboctahedra, and faces with eight equivalent TeO6 octahedra. All Cs–O bond lengths are 3.01 Å. Te is bonded to six equivalent O atoms to form TeO6 octahedra that share corners with six equivalent TeO6 octahedra and faces with eight equivalent CsO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Te–O bond lengths are 2.13 Å. O is bonded to four equivalent Cs and two equivalent Te atoms to form a mixture of distorted face, edge, and corner-sharing OCs4Te2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°.

36 MATERIALS SCIENCE↗

Materials Data on NbTlTeO6 by Materials Project

Tl(NbTe)O6 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 38–44°. There are a spread of Nb–O bond distances ranging from 1.85–2.18 Å. Tl1+ is bonded in a 4-coordinate geometry to three O2- atoms. There are two shorter (2.91 Å) and one longer (2.99 Å) Tl–O bond lengths. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with two equivalent TeO6 octahedra and corners with four equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–45°. There are a spread of Te–O bond distances ranging from 1.92–1.98 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Tl1+ and two equivalent Te6+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Nb5+ and one Te6+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Nb5+, one Tl1+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Pr2TeO6 by Materials Project

Pr2TeO6 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent Pr3+ sites. In the first Pr3+ site, Pr3+ is bonded to seven O2- atoms to form distorted PrO7 hexagonal pyramids that share corners with three equivalent TeO6 octahedra, edges with two equivalent PrO7 hexagonal pyramids, and edges with two equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 36–44°. There are a spread of Pr–O bond distances ranging from 2.41–2.58 Å. In the second Pr3+ site, Pr3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pr–O bond distances ranging from 2.36–2.72 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with three equivalent PrO7 hexagonal pyramids and edges with two equivalent PrO7 hexagonal pyramids. There are a spread of Te–O bond distances ranging from 1.93–1.99 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Pr3+ and one Te6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Pr3+ and one Te6+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Pr3+ and one Te6+ atom. In the fourth O2- site, O2- is bonded to three Pr3+ and one Te6+ atom to form distorted corner-sharing OPr3Te tetrahedra. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Pr3+ and one Te6+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two Pr3+ and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Sr2MgTeO6 by Materials Project

Sr2MgTeO6 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Sr2+ is bonded to twelve O2- atoms to form distorted SrO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, faces with four equivalent MgO6 octahedra, and faces with four equivalent TeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.62–3.08 Å. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent TeO6 octahedra and faces with eight equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–14°. There are two shorter (2.08 Å) and four longer (2.09 Å) Mg–O bond lengths. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent MgO6 octahedra and faces with eight equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–14°. All Te–O bond lengths are 1.95 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Sr2+, one Mg2+, and one Te6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Sr2+, one Mg2+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Na3Te(PO7)2 by Materials Project

Na3Te(PO7)2 crystallizes in the orthorhombic C222_1 space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded to six O atoms to form distorted NaO6 octahedra that share corners with two equivalent TeO6 octahedra, corners with four equivalent PO4 tetrahedra, and edges with two equivalent NaO6 octahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Na–O bond distances ranging from 2.40–2.52 Å. In the second Na site, Na is bonded to six O atoms to form distorted NaO6 octahedra that share corners with two equivalent TeO6 octahedra, corners with four equivalent PO4 tetrahedra, and edges with two NaO6 octahedra. The corner-sharing octahedra tilt angles range from 47–48°. There are a spread of Na–O bond distances ranging from 2.39–2.53 Å. P is bonded to four O atoms to form PO4 tetrahedra that share corners with six NaO6 octahedra. The corner-sharing octahedra tilt angles range from 43–54°. There is one shorter (1.51 Å) and three longer (1.55 Å) P–O bond length. Te is bonded to six O atoms to form distorted TeO6 octahedra that share corners with six NaO6 octahedra. The corner-sharing octahedra tilt angles range from 47–48°. There is four shorter (1.93 Å) and two longer (1.94 Å) Te–O bond length. There are seven inequivalent O sites. In the first O site, O is bonded in a rectangular see-saw-like geometry to three Na and one P atom. In the second O site, O is bonded in a distorted bent 150 degrees geometry to one Na and one P atom. In the third O site, O is bonded in a distorted bent 150 degrees geometry to one Na and one P atom. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Na and one P atom. In the fifth O site, O is bonded in a distorted bent 120 degrees geometry to one Na and one Te atom. In the sixth O site, O is bonded in a distorted bent 120 degrees geometry to one Na and one Te atom. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to one Na and one Te atom.

36 MATERIALS SCIENCE↗

Materials Data on NiTeO3 by Materials Project

NiTeO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ni2+ is bonded to four O2- atoms to form distorted NiO4 trigonal pyramids that share corners with eight equivalent TeO6 octahedra and corners with two equivalent NiO4 trigonal pyramids. The corner-sharing octahedra tilt angles range from 60–83°. There are a spread of Ni–O bond distances ranging from 2.01–2.17 Å. Te4+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent TeO6 octahedra and corners with eight equivalent NiO4 trigonal pyramids. The corner-sharing octahedra tilt angles range from 50–53°. There are a spread of Te–O bond distances ranging from 2.16–2.28 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to one Ni2+ and two equivalent Te4+ atoms. In the second O2- site, O2- is bonded to two equivalent Ni2+ and two equivalent Te4+ atoms to form distorted corner-sharing ONi2Te2 trigonal pyramids.

36 MATERIALS SCIENCE↗

Materials Data on Sr2CaTeO6 by Materials Project

Sr2CaTeO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–2.95 Å. Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 25–28°. There are four shorter (2.31 Å) and two longer (2.33 Å) Ca–O bond lengths. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 25–28°. All Te–O bond lengths are 1.96 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+, one Ca2+, and one Te6+ atom to form distorted corner-sharing OSr2CaTe tetrahedra. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+, one Ca2+, and one Te6+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+, one Ca2+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Ba2SrTeO6 by Materials Project

Ba2SrTeO6 is Orthorhombic Perovskite-derived structured and crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine equivalent O2- atoms. There are a spread of Ba–O bond distances ranging from 2.79–3.14 Å. Sr2+ is bonded to six equivalent O2- atoms to form SrO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedral tilt angles are 17°. All Sr–O bond lengths are 2.44 Å. Te6+ is bonded to six equivalent O2- atoms to form TeO6 octahedra that share corners with six equivalent SrO6 octahedra. The corner-sharing octahedral tilt angles are 17°. All Te–O bond lengths are 1.96 Å. O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Sr2+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Cd3TeO6 by Materials Project

Cd3TeO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Cd–O bond distances ranging from 2.28–2.81 Å. In the second Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 34–45°. There are a spread of Cd–O bond distances ranging from 2.23–2.43 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 34–45°. There are a spread of Te–O bond distances ranging from 1.95–1.98 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Cd2+ and one Te6+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four Cd2+ and one Te6+ atom. In the third O2- site, O2- is bonded in a distorted see-saw-like geometry to three Cd2+ and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Sr2NiTeO6 by Materials Project

Sr2NiTeO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–3.19 Å. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 15–20°. All Ni–O bond lengths are 2.10 Å. Te4+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent NiO6 octahedra. The corner-sharing octahedra tilt angles range from 15–20°. All Te–O bond lengths are 1.95 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to four equivalent Sr2+, one Ni4+, and one Te4+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four equivalent Sr2+, one Ni4+, and one Te4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Ba(TeO3)2 by Materials Project

BaTe2O6 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.91–3.07 Å. There are two inequivalent Te5+ sites. In the first Te5+ site, Te5+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with two equivalent TeO6 octahedra and corners with four equivalent TeO5 square pyramids. The corner-sharing octahedral tilt angles are 38°. There is four shorter (1.95 Å) and two longer (1.97 Å) Te–O bond length. In the second Te5+ site, Te5+ is bonded to five O2- atoms to form corner-sharing TeO5 square pyramids. The corner-sharing octahedral tilt angles are 59°. There are one shorter (1.85 Å) and four longer (2.15 Å) Te–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+ and two Te5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Te5+ atoms. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one Te5+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Be4TeO7 by Materials Project

Be4TeO7 crystallizes in the cubic F-43m space group. The structure is three-dimensional. Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share corners with three equivalent TeO6 octahedra and corners with six equivalent BeO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There is one shorter (1.63 Å) and three longer (1.65 Å) Be–O bond length. Te6+ is bonded to six equivalent O2- atoms to form TeO6 octahedra that share corners with twelve equivalent BeO4 tetrahedra. All Te–O bond lengths are 1.95 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a tetrahedral geometry to four equivalent Be2+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Be2+ and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrTe3O8 by Materials Project

SrTe3O8 crystallizes in the tetragonal P4_2/m space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.54 Å) and four longer (2.84 Å) Sr–O bond lengths. There are two inequivalent Te+4.67+ sites. In the first Te+4.67+ site, Te+4.67+ is bonded to five O2- atoms to form distorted TeO5 square pyramids that share corners with three equivalent TeO6 octahedra and an edgeedge with one TeO5 square pyramid. The corner-sharing octahedra tilt angles range from 45–60°. There are a spread of Te–O bond distances ranging from 1.98–2.22 Å. In the second Te+4.67+ site, Te+4.67+ is bonded to six O2- atoms to form corner-sharing TeO6 octahedra. There is four shorter (1.96 Å) and two longer (1.97 Å) Te–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Sr2+ and two equivalent Te+4.67+ atoms. In the second O2- site, O2- is bonded to two equivalent Sr2+ and two Te+4.67+ atoms to form a mixture of distorted corner and edge-sharing OSr2Te2 tetrahedra. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Te+4.67+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on SrLiPrTeO6 by Materials Project

LiSrPrTeO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Pc space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 20–29°. There are a spread of Li–O bond distances ranging from 2.10–2.19 Å. Sr2+ is bonded in a 12-coordinate geometry to eleven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–3.12 Å. Pr3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pr–O bond distances ranging from 2.42–2.89 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent LiO6 octahedra. The corner-sharing octahedra tilt angles range from 20–29°. There are a spread of Te–O bond distances ranging from 1.93–1.96 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Sr2+, two equivalent Pr3+, and one Te6+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two equivalent Sr2+, one Pr3+, and one Te6+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two equivalent Sr2+, one Pr3+, and one Te6+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Li1+, two equivalent Sr2+, one Pr3+, and one Te6+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two equivalent Sr2+, one Pr3+, and one Te6+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two equivalent Sr2+, one Pr3+, and one Te6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on LiCaPrTeO6 by Materials Project

LiCaPrTeO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Pc space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 29–37°. There are a spread of Li–O bond distances ranging from 2.06–2.43 Å. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.75 Å. Pr3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.41–2.78 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent LiO6 octahedra. The corner-sharing octahedra tilt angles range from 29–37°. There is five shorter (1.95 Å) and one longer (1.97 Å) Te–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to one Li1+, one Ca2+, one Pr3+, and one Te6+ atom to form distorted corner-sharing OLiCaPrTe tetrahedra. In the second O2- site, O2- is bonded in a 5-coordinate geometry to one Li1+, two equivalent Ca2+, one Pr3+, and one Te6+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to one Li1+, two equivalent Ca2+, one Pr3+, and one Te6+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Li1+, one Ca2+, two equivalent Pr3+, and one Te6+ atom. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to one Li1+, one Ca2+, two equivalent Pr3+, and one Te6+ atom. In the sixth O2- site, O2- is bonded to one Li1+, one Ca2+, one Pr3+, and one Te6+ atom to form distorted corner-sharing OLiCaPrTe tetrahedra.

36 MATERIALS SCIENCE↗

Materials Data on Ca3TeO6 by Materials Project

Ca3TeO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–3.04 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 32–40°. There are a spread of Ca–O bond distances ranging from 2.28–2.36 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with six equivalent CaO6 octahedra. The corner-sharing octahedra tilt angles range from 32–40°. There is two shorter (1.95 Å) and four longer (1.96 Å) Te–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to four Ca2+ and one Te6+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four Ca2+ and one Te6+ atom. In the third O2- site, O2- is bonded to three Ca2+ and one Te6+ atom to form distorted corner-sharing OCa3Te tetrahedra.

36 MATERIALS SCIENCE↗

Materials Data on Ag2Hg2(TeO4)3 by Materials Project

Ag2Hg2(TeO4)3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ag1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ag–O bond distances ranging from 2.38–2.89 Å. Hg2+ is bonded in a 2-coordinate geometry to five O2- atoms. There are a spread of Hg–O bond distances ranging from 2.10–2.85 Å. There are two inequivalent Te6+ sites. In the first Te6+ site, Te6+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing TeO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Te–O bond distances ranging from 1.88–2.02 Å. In the second Te6+ site, Te6+ is bonded to six O2- atoms to form corner-sharing TeO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Te–O bond distances ranging from 1.96–2.00 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ag1+, two equivalent Hg2+, and one Te6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Ag1+ and two Te6+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ag1+, one Hg2+, and one Te6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Te6+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one Ag1+, one Hg2+, and two equivalent Te6+ atoms. In the sixth O2- site, O2- is bonded to two equivalent Ag1+, one Hg2+, and one Te6+ atom to form distorted corner-sharing OAg2HgTe trigonal pyramids.

36 MATERIALS SCIENCE↗