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Title: Single crystal neutron diffraction analysis of the cation distribution in the high temperature phases. cap alpha. -Cu/sub 2-x/S,. cap alpha. -Cu/sub 2-x/Se, and. cap alpha. -Ag/sub 2/Se

Abstract

The distribution and thermal vibration of the mobile cations have been studied for ..cap alpha..-Cu/sub 2-x/S (200/sup 0/C), ..cap alpha..-Cu/sub 2-x/Se (160, 210, and 360/sup 0/C), and ..cap alpha..-Ag/sub 2/Se (135, 150, 200, and 300/sup 0/C). Both ..cap alpha..-Cu/sub 2-x/S and ..cap alpha..-Cu/sub 2-x/Se, space group Fm3m, have an fcc anion array within which anharmonically-vibrating Cu atoms are displaced from the centers of the tetrahedra towards the vacant octahedral interstices. ..cap alpha..-Ag/sub 2/Se, space group Im3m, has Se in bcc packing and displays a cation distribution which is delocalized in channels along <100> similar to ..beta..-Ag/sub 2/S. Local maxima in the Ag density occur in pairs about the center of the tetrahedral interstice. 14 refs., 2 figs., 3 tabs.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA); Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Materials Science and Engineering
OSTI Identifier:
6089204
Report Number(s):
BNL-40226; CONF-8709116-5
ON: DE87014915
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: 6. international conference on solid state ionics, Garmisch-Partenkirchen, F.R. Germany, 6 Sep 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER SELENIDES; CATIONS; CRYSTAL STRUCTURE; COPPER SULFIDES; SILVER SELENIDES; BCC LATTICES; FCC LATTICES; HCP LATTICES; HIGH TEMPERATURE; IONIC CONDUCTIVITY; MONOCRYSTALS; NEUTRON DIFFRACTION; SILVER SULFIDES; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTALS; CUBIC LATTICES; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; HEXAGONAL LATTICES; IONS; PHYSICAL PROPERTIES; SCATTERING; SELENIDES; SELENIUM COMPOUNDS; SILVER COMPOUNDS; SULFIDES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360602* - Other Materials- Structure & Phase Studies

Citation Formats

Oliveria, M, McMullan, R K, and Wuensch, B J. Single crystal neutron diffraction analysis of the cation distribution in the high temperature phases. cap alpha. -Cu/sub 2-x/S,. cap alpha. -Cu/sub 2-x/Se, and. cap alpha. -Ag/sub 2/Se. United States: N. p., 1987. Web.
Oliveria, M, McMullan, R K, & Wuensch, B J. Single crystal neutron diffraction analysis of the cation distribution in the high temperature phases. cap alpha. -Cu/sub 2-x/S,. cap alpha. -Cu/sub 2-x/Se, and. cap alpha. -Ag/sub 2/Se. United States.
Oliveria, M, McMullan, R K, and Wuensch, B J. 1987. "Single crystal neutron diffraction analysis of the cation distribution in the high temperature phases. cap alpha. -Cu/sub 2-x/S,. cap alpha. -Cu/sub 2-x/Se, and. cap alpha. -Ag/sub 2/Se". United States.
@article{osti_6089204,
title = {Single crystal neutron diffraction analysis of the cation distribution in the high temperature phases. cap alpha. -Cu/sub 2-x/S,. cap alpha. -Cu/sub 2-x/Se, and. cap alpha. -Ag/sub 2/Se},
author = {Oliveria, M and McMullan, R K and Wuensch, B J},
abstractNote = {The distribution and thermal vibration of the mobile cations have been studied for ..cap alpha..-Cu/sub 2-x/S (200/sup 0/C), ..cap alpha..-Cu/sub 2-x/Se (160, 210, and 360/sup 0/C), and ..cap alpha..-Ag/sub 2/Se (135, 150, 200, and 300/sup 0/C). Both ..cap alpha..-Cu/sub 2-x/S and ..cap alpha..-Cu/sub 2-x/Se, space group Fm3m, have an fcc anion array within which anharmonically-vibrating Cu atoms are displaced from the centers of the tetrahedra towards the vacant octahedral interstices. ..cap alpha..-Ag/sub 2/Se, space group Im3m, has Se in bcc packing and displays a cation distribution which is delocalized in channels along <100> similar to ..beta..-Ag/sub 2/S. Local maxima in the Ag density occur in pairs about the center of the tetrahedral interstice. 14 refs., 2 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6089204}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Conference:
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