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The lattice parameters of α-alumina and chromic oxide

Published online by Cambridge University Press:  14 March 2018

A. H. Jay  and
W. T. Wilde
A. H. Jay
Affiliation:
Central Research Department, The United Steel Companies Limited, Stocksbridge, near Sheffield
W. T. Wilde
Affiliation:
Refractories Department, Sheffield University
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Extract

During the course of a study of the interaction of certain pure refractory oxides at high temperatures it became necessary to obtain accurate values for the lattice parameters of α-alumina and chromic oxide. Values obtained by previous workers, listed in table I, did not attain a greater accuracy than one part in 2000, whereas the use of large-diameter powder cameras calibrated with quartz now yield lattice parameters accurate to at least one part in 30,000.

Samples of the calcined oxides were examined in a 19 cm. diameter powder camera, alumina with cobalt Kα radiation and chromic oxide with chromium Kα radiation. Results are given in tables II and III.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 27 , Issue 187 , December 1944 , pp. 56 - 58
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1944

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References

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