Materials Data on Dy2Ge2O7 by Materials Project
Dy2Ge2O7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded to eight O2- atoms to form distorted DyO8 hexagonal bipyramids that share corners with two equivalent GeO4 tetrahedra, edges with two equivalent DyO8 hexagonal bipyramids, edges with two equivalent DyO6 octahedra, and edges with four GeO4 tetrahedra. There are a spread of Dy–O bond distances ranging from 2.33–2.57 Å. In the second Dy3+ site, Dy3+ is bonded to six O2- atoms to form DyO6 octahedra that share corners with two equivalent DyO6 octahedra, corners with six GeO4 tetrahedra, and edges with two equivalent DyO8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 59°. There are a spread of Dy–O bond distances ranging from 2.25–2.33 Å. There are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent DyO8 hexagonal bipyramids, corners with two equivalent DyO6 octahedra, a cornercorner with one GeO4 tetrahedra, and edges with two equivalent DyO8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. There is three shorter (1.75 Å) and one longer (1.79 Å) Ge–O bond length. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with four equivalent DyO6 octahedra, a cornercorner with one GeO4 tetrahedra, and edges with two equivalent DyO8 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 48–61°. There are a spread of Ge–O bond distances ranging from 1.75–1.81 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Dy3+ and two Ge4+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Dy3+ and one Ge4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Dy3+ and one Ge4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Dy3+ and one Ge4+ atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Dy3+ and one Ge4+ atom.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- MIT; UC Berkeley; Duke; U Louvain
- DOE Contract Number:
- AC02-05CH11231; EDCBEE
- OSTI ID:
- 1306950
- Report Number(s):
- mp-780293
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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