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The crystal-structure of the bismuth oxyhalides

Published online by Cambridge University Press:  14 March 2018

F. A. Bannister
F. A. Bannister*
Affiliation:
British Museum of Natural History
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Extract

A. De Schulten published a crystallographic and optical investigation of the bismuth oxyhalides in 1900. He succeeded in preparing minute square plates capped with pyramidal planes, but evidently the difficulties of manipulation prevented the measurement of interfacial angles. He did, however, record a negative uniaxial figure observed in a direction perpendicular to the plane of the square plates of all three salts BiOCl, BiOBr, and BiOI. The present work was undertaken to extend A. de Schulten's observations, to measure the axial ratios, and to determine the crystal-structure.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 24 , Issue 149 , June 1935 , pp. 49 - 58
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1935

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References

page 49 note 1 de Schulten, A., Bull. Soc. Chim. paris, 1900, vol. 23, p. 156.Google Scholar

page 51 note 1 Nieuwenkamp, W. and Bijvoet, J. M., Zeits. Krist., 1932, vol. 82, p. 157.Google Scholar [M.A. 5-177.]

page 51 note 2 Bannister, F. A., Min. Mag., 1934, vol. 23, pp. 587-597.Google Scholar

page 55 note 1 Domeyko, I., Compt. Rend. Acad. Sci. Paris, 1876, vol. 82, p. 922 Google Scholar; Miueralojla, 3rd edit., Santiago de Chile, 1879, p. 297. :Not to be confused wilh daubreelite, FeCr2,S4, a mineral associated with troilite in mcteoric irons, and also named after G. A. Daubr ée in the same year by J. L. Smith.

page 55 note 2 Domeyko, I., Compt. Rend. Acad. Sci. Paris, 1877, vol. 85, p. 955 Google Scholar, Min., 3rd edit., 1879, p. 298. Preliminary qualitative chemical tests and X-ray work suggest that the so-called taznite is impure compact atelestite, basic bismuth arsenate.