On the morphology of β-K 2SO 4 type structures; theory and observation

In this paper we derive the theoretical morphology of the -K 2SO 4 type structure. The theories we use are the Hartman-Perdok theory combined with the theory of roughening transition. To predict the stability of faces at a certain temperature, we use calculated Ising temperatures. With these results...

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Bibliographic Details
Published inJournal of crystal growth Vol. 110; no. 3; pp. 604 - 616
Main Authors Vogels, L.J.P., Verheijen, M.A., Bennema, P.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1991
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Summary:In this paper we derive the theoretical morphology of the -K 2SO 4 type structure. The theories we use are the Hartman-Perdok theory combined with the theory of roughening transition. To predict the stability of faces at a certain temperature, we use calculated Ising temperatures. With these results we are able to construct the equilibrium and growth forms using a Gibbs-Wulff plot. The results of the theory are compared with morphological data from the literature, our own observations and sphere experiments. Three examples are investigated in more detail, namely -K 2SO 4, ((CH 3) 4N) 2ZnBr 4 and ((CH 3) 4N) 2ZnCl 4. A comparison of theory and observations yields satisfactory results.
ISSN:0022-0248
1873-5002
DOI:10.1016/0022-0248(91)90298-J