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Preparation and some properties of synthetic proustite single crystals
Author(s) -
Holovey M. I.,
Olexeyuk I. D.,
Gurzan M. I.,
Rez I. S.,
Panyko V. V.,
Voroshilov Yu. V.,
Rigan M. Yu.,
Ganeyev I. G.,
Bogdanova A. V.
Publication year - 1971
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19710060507
Subject(s) - crystallization , supercooling , materials science , temperature gradient , atmospheric temperature range , thermal , optical transparency , crystal growth , crystal (programming language) , optics , crystallography , mineralogy , thermodynamics , chemistry , optoelectronics , physics , quantum mechanics , computer science , programming language
Conditions for the preparation of proustite single crystals are reported. For selecting these conditions temperature gradients in the crystallisation zone and in the melt, the rate of moving of the crystallisation front, the radial gradient, tube geometry, stabilisation of temperature, mechanisms of zone travelling, partial pressures were changed. – Differential‐thermal, X‐ray, and spectral‐chemical analysis were applied to initial substances and final crystal bodies. To decrease the influence of spontaneous crystallisation an optimal temperature gradient was applied approaching maximum undercooling at the liquid‐solid interface. – Optically transparent proustite crystals resulted. In the range from 1 to 12 μm they show 80% transparency. Microhardness was measured along the growth direction which deviated from the c ‐axis about 25°.