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Title: CuNd{sub 2}Ge{sub 2}O{sub 8}: Crystal growth, crystal structure, and magnetic and spectroscopic properties

Abstract

After crystals of CuNd{sub 2}Ge{sub 2}O{sub 8} are grown using CuO as self flux, the crystal structure is determined by single-crystal X-ray diffraction in the space group Cm (No. 8) to an R value of 5.1%. It is monoclinic, with a = 9.846(2){angstrom}, b=15.335(5) {angstrom}, c=8.336(1) {angstrom}, {beta}=148.48(2), V=657.9(5) {angstrom}{sub 3}, Z=4, and D{sub c}=6.31 g cm{sup -3}. CuNd{sub 2}Ge{sub 2}O{sub 8} shows a novel tridimensional structure type with chains of very distorted CuO{sub 6} octahedra, two kinds of coordinations for germanium (GeO{sub 5} trigonal bipyramids and rather regular GeO{sub 4} tetrahedra), and NdO{sub 8} triangulated dodecahedra. Above 100 K the reciprocal of the dc magnetic susceptibility of CuNd{sub 2}Ge{sub 2}O{sub 8} follows the Curie-Weiss law {chi}{sup -1} = 162(1)T+5971(93)g Oe/emu, with Weiss constant of spectra in the range 1000-100 cm{sup -1} are related to those of comparable species. The absorption spectrum at room temperature in the 350-7000 nm region is also given.

Authors:
 [1]; ; ;  [2]; ;  [3]
  1. Facultad de Ciencias Geologicas, Mandrid (Spain)
  2. Instituto de Ciencia de Materiales, Mandrid (Spain)
  3. Universidad de Santiago de Compostela (Spain); and others
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
283005
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 120; Journal Issue: 2; Other Information: PBD: Dec 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER OXIDES; CRYSTAL STRUCTURE; MAGNETIC SUSCEPTIBILITY; NEODYMIUM OXIDES; GERMANIUM OXIDES; MONOCLINIC LATTICES; CRYSTAL GROWTH; X-RAY DIFFRACTION; ABSORPTION SPECTROSCOPY

Citation Formats

Campa, J A, Gutierrez-Puebla, E, Monge, M A, Valero, R C, Mira, J, and Rivas, J. CuNd{sub 2}Ge{sub 2}O{sub 8}: Crystal growth, crystal structure, and magnetic and spectroscopic properties. United States: N. p., 1995. Web. doi:10.1006/jssc.1995.1406.
Campa, J A, Gutierrez-Puebla, E, Monge, M A, Valero, R C, Mira, J, & Rivas, J. CuNd{sub 2}Ge{sub 2}O{sub 8}: Crystal growth, crystal structure, and magnetic and spectroscopic properties. United States. doi:10.1006/jssc.1995.1406.
Campa, J A, Gutierrez-Puebla, E, Monge, M A, Valero, R C, Mira, J, and Rivas, J. Fri . "CuNd{sub 2}Ge{sub 2}O{sub 8}: Crystal growth, crystal structure, and magnetic and spectroscopic properties". United States. doi:10.1006/jssc.1995.1406.
@article{osti_283005,
title = {CuNd{sub 2}Ge{sub 2}O{sub 8}: Crystal growth, crystal structure, and magnetic and spectroscopic properties},
author = {Campa, J A and Gutierrez-Puebla, E and Monge, M A and Valero, R C and Mira, J and Rivas, J},
abstractNote = {After crystals of CuNd{sub 2}Ge{sub 2}O{sub 8} are grown using CuO as self flux, the crystal structure is determined by single-crystal X-ray diffraction in the space group Cm (No. 8) to an R value of 5.1%. It is monoclinic, with a = 9.846(2){angstrom}, b=15.335(5) {angstrom}, c=8.336(1) {angstrom}, {beta}=148.48(2), V=657.9(5) {angstrom}{sub 3}, Z=4, and D{sub c}=6.31 g cm{sup -3}. CuNd{sub 2}Ge{sub 2}O{sub 8} shows a novel tridimensional structure type with chains of very distorted CuO{sub 6} octahedra, two kinds of coordinations for germanium (GeO{sub 5} trigonal bipyramids and rather regular GeO{sub 4} tetrahedra), and NdO{sub 8} triangulated dodecahedra. Above 100 K the reciprocal of the dc magnetic susceptibility of CuNd{sub 2}Ge{sub 2}O{sub 8} follows the Curie-Weiss law {chi}{sup -1} = 162(1)T+5971(93)g Oe/emu, with Weiss constant of spectra in the range 1000-100 cm{sup -1} are related to those of comparable species. The absorption spectrum at room temperature in the 350-7000 nm region is also given.},
doi = {10.1006/jssc.1995.1406},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 120,
place = {United States},
year = {1995},
month = {12}
}