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Spirals on flux‐grown plates of CaWO 4
Author(s) -
Patel A. R.,
Arora S. K.
Publication year - 1975
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.19750100404
Subject(s) - spiral (railway) , isothermal process , materials science , evaporation , flux (metallurgy) , etching (microfabrication) , tungstate , optics , crystallography , composite material , metallurgy , chemistry , physics , thermodynamics , mathematical analysis , mathematics , layer (electronics)
Thin and transparant single crystalline plates of calcium tungstate have been grown by using the method of isothermal flux evaporation at 840°C. The floating plates exhibited spiral depression on their top as‐grown surfaces as revealed by high resolution (20 A°) electron‐optical plant. It is believed that the spiral pattern results from thermal etching at the sites of helical dislocations.