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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Dy2TeO2 by Materials Project

Dy2TeO2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Dy3+ is bonded in a 4-coordinate geometry to four equivalent Te2- and four equivalent O2- atoms. All Dy–Te bond lengths are 3.45 Å. All Dy–O bond lengths are 2.25 Å. Te2- is bonded in a distorted body-centered cubic geometry to eight equivalent Dy3+ atoms. O2- is bonded to four equivalent Dy3+ atoms to form a mixture of corner and edge-sharing ODy4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2Te4O11 by Materials Project

Dy2Te4O11 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.27–2.58 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a distorted see-saw-like geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.87–2.33 Å. In the second Te4+ site, Te4+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.90–2.59 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Te4+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Dy3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Dy3+ and two Te4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Dy3+ and two Te4+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Dy3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Dy3+ and one Te4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy2TeO6 by Materials Project

Dy2TeO6 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Dy–O bond distances ranging from 2.25–2.60 Å. In the second Dy3+ site, Dy3+ is bonded to seven O2- atoms to form distorted DyO7 hexagonal pyramids that share corners with three equivalent TeO6 octahedra, edges with two equivalent DyO7 hexagonal pyramids, and edges with two equivalent TeO6 octahedra. The corner-sharing octahedra tilt angles range from 39–45°. There are a spread of Dy–O bond distances ranging from 2.29–2.47 Å. Te6+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with three equivalent DyO7 hexagonal pyramids and edges with two equivalent DyO7 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 trigonal planar geometry to two equivalent Dy3+ and one Te6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Dy3+ and one Te6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Dy3+ and one Te6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Dy3+ and one Te6+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to three Dy3+ and one Te6+ atom. In the sixth O2- site, O2- is bonded to three Dy3+ and one Te6+ atom to form distorted corner-sharing ODy3Te tetrahedra.

36 MATERIALS SCIENCE↗