Author:
Jamieson J. W. S.,Frost G. B.
Abstract
Magnesium sulphate monohydrate prepared by vacuum dehydration of the heptahydrate does not yield a pattern of X-ray diffraction lines, and in this sense may be said to have an amorphous character. By measurement of the heats of solution of the “X-ray amorphous” and crystalline monohydrates, the heat of transition has been found to be 6550 cal. mole−1. Cobaltous chloride monohydrate prepared by vacuum dehydration appears to be microcrystalline. The heat of transition to the normal crystalline form is 1390 cal. mole−1. These values are related to the surface areas of the vacuum dehydrated products.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
10 articles.
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