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Phase Relations and Crystal Structures of Zn and Cd Tungstates
Author(s) -
MORELL DOUGLAS J.,
CANTRELL JOSEPH S.,
CHANG LUKE L. Y.
Publication year - 1980
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1980.tb10715.x
Subject(s) - wolframite , isostructural , crystallography , crystal structure , materials science , phase (matter) , tungstate , crystal (programming language) , chemistry , tungsten , metallurgy , organic chemistry , computer science , programming language
The systems ZnO‐WO 3 and CdO‐WO 3 show similar phase relations, each having a 1:1 phase. Invariant points established are 1182°C and 56 mol% ZnO, 1090° and 34 mol% ZnO, and 1105° and 31.5 mol% CdO. The crystal structure of CdWO 4 , determined by the single‐crystal method, was isostructural with ZnWO 4 , a wolframite type. Cell dimensions are a =0.5013, b = 0.5090, and c = 0.5866 nm and γ= 91.46° with a space group P 2/ b and Z = 2. The measured and calculated densities are 7.83 and 7.79 g/cm 3 , respectively. ZnWO 4 and CdWO 4 formed a complete series of solid solutions at 900° to 1160°C, above which melting occurred.