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Neutron-diffraction structure of a low-water grossular at 20 K

Lager, G. A. and Rossman, G. R. and Rotella, F. J. and Schultz, A. J. (1987) Neutron-diffraction structure of a low-water grossular at 20 K. American Mineralogist, 72 (7-8). pp. 766-768. ISSN 0003-004X.

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The crystal structure of a low-water (0.16 wt% OH) grossular has been refined at 20 K by single-crystal time-of-flight neutron-diffraction methods. Comparisons with the room temperature structure indicate that between 298 and 20 K, the silicate tetrahedron undergoes a small rigid-body rotation that results in an increase in the y parameter of oxygen. The mechanism of thermal expansion is significantly different from that at high temperature where the tetrahedra do not rotate and changes in the structure reflect only unit-cell expansion.

Item Type:Article
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Rossman, G. R.0000-0002-4571-6884
Additional Information:© 1987 Mineralogical Society of America. Manuscript received November 14, 1986. Manuscript accepted April 24, 1987. The work at Argonne National Laboratory was supported by the Office of Basic Energy Sciences, Division of Materials Sciences, U.S. Department of Energy under Contract W-31-109-Eng-38. G.A.L. acknowledges support of this research by the National Science Foundation (Experimental and Theoretical Geochemistry) through Grant EAR-8205605.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Department of Energy (DOE) Office of Basic Energy SciencesW-31-109-Eng-38
Issue or Number:7-8
Record Number:CaltechAUTHORS:20130514-134155195
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Official Citation: G. A. Lager, G. R. Rossman, F. J. Rotella, and A. J. Schultz Neutron-diffraction structure of a low-water grossular at 20 K American Mineralogist, August 1987, v. 72, p. 766-768
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38503
Deposited By: Ruth Sustaita
Deposited On:14 May 2013 21:02
Last Modified:26 Nov 2019 11:15

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