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The question of a relation between the Parallel Growths of Crystals and Isomorphous Miscibility, and the bearing of Parallel Growths on questions of Isomorphism

Published online by Cambridge University Press:  14 March 2018

Thomas Vipond Barker*
Affiliation:
Magdalen College, Oxford

Extract

One of the most important and striking properties of isomorphous substances is their capacity for forming microscopically homogeneous mixed crystals, the physical properties of which are, as Retgers has especially shown, intermediate between the properties of the constituents. With the great majority of isomorphous substances the mixed crystals can be obtained in all proportions, but with others the miscibility is limited.

The first case of restricted miscibility was discovered by Retgers in potassium phosphate (mol. vo1.=58.25) and ammonium phosphate (64.17) crystallizing in the tetragonal system ; he did not determine the exact proportions which each salt can take up of the other, but estimated them to be about 20 per cent. each way.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1908

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References

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