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Crystallization and optical properties of CaWO 4 and SrWO 4
Author(s) -
Arora S. K.,
Chudasama B.
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200610727
Subject(s) - tungstate , absorption edge , crystallization , thermogravimetric analysis , flux (metallurgy) , absorption (acoustics) , analytical chemistry (journal) , dielectric , strontium , flux method , materials science , chemistry , crystal growth , mineralogy , crystallography , inorganic chemistry , band gap , single crystal , optoelectronics , organic chemistry , chromatography , metallurgy , composite material
Single crystals of calcium tungstate and strontium tungstate have been grown by double decomposition flux reaction technique using lithium chloride as flux. Growth conditions are optimized to synthesize well faceted crystals. Effect of primary and secondary flux density in the growth charge has been studied. Thermogravimetric study reveals that the grown crystals are highly stable in the temperature range 25 – 1000°C. Analysis of optical absorption normal to the ab‐plane in the spectral range of 200 – 800 nm reveals the true absorption edge, the nature of transition being the allowed indirect one at 4.60 eV and 4.56 eV respectively for CaWO 4 and SrWO 4 . The crystals have been characterized by determining useful pertinent optical and dielectric parameters. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)