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Melt‐Growth of Single Crystals of Cadmium Iodide and Study of Their Polytypsim by X‐ray Diffraction
Author(s) -
Chaudhary S.K.,
Trigunayat G.C.
Publication year - 1982
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.2170170411
Subject(s) - ampoule , impurity , diffraction , iodide , materials science , crystal (programming language) , crystallography , crystal growth , raw material , x ray crystallography , analytical chemistry (journal) , cadmium , chemistry , optics , metallurgy , composite material , inorganic chemistry , chromatography , organic chemistry , physics , computer science , programming language
Single crystals of cadmium iodide have been grown from melt using Bridgman‐Stockbarger system and their polytypism studied by X‐ray diffraction. The initially grown crystals were found to stick to the walls of the ampoule and had black specks of impurity suspended in them. A systematic study has been carried out to determine the effect of degree of vacuum, material of the ampoule and quality of raw material on crystal growth. It has been concluded and later verified using zone‐refined material that the observed sticking essentially stems from the presence of impurities in the raw material. From X‐ray diffraction it is found that all crystals belong to the most common polytype 4H alone.