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Thermal expansion coefficients and Gruneisen parameters of quartz at high temperature by X-ray method

Published online by Cambridge University Press:  10 January 2013

Nabil N. Rammo  and
Saad B. Farid
Nabil N. Rammo
Affiliation:
Ministry of Higher Education and Scientific Research, P.O. Box 1240, Baghdad, Iraq
Saad B. Farid
Affiliation:
Ministry of Higher Education and Scientific Research, P.O. Box 1240, Baghdad, Iraq
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Abstract

The temperature variation of the interplanar spacings (101), (112), and (211) of 325 mesh quartz was determined in the range 300–966 °K using X-ray powder diffractometry. The measured lattice parameters have been found to increase nonlinearly with temperature, and the dependence has been expressed by a polynomial of second degree from the least-squares fitting of the data, the results of which are presented herein. Values are given for the thermal expansion coefficients and Gruneisen parameter in the range 300 to 768 °K. In the range 768–966 °K, the expansion is zero. The derivatives dαa/dT, dαc/dT, and dαv/dT at ambient temperature are also given.

Type
Research Article
Information
Powder Diffraction , Volume 9 , Issue 2 , June 1994 , pp. 148 - 150
Copyright
Copyright © Cambridge University Press 1994

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