Premium
Thermal expansion of In 2 O 3
Author(s) -
Kundra K. D.,
Ali S. Z.
Publication year - 1970
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889870006842
Subject(s) - extrapolation , thermal expansion , atmospheric temperature range , analytical chemistry (journal) , constant (computer programming) , thermal , materials science , thermodynamics , chemistry , physics , mathematics , mathematical analysis , chromatography , computer science , programming language
The thermal expansion of In 2 O 3 powder was determined over the temperature range 30–968°C using X‐ray techniques. The values of Δ a / a O , as determined by the least‐squares method, are given by Δ a / a O = (7.20±0.06) x 10 −6 T + (1.15±0.08)±10 −9 T 2 . The values of the cell constant at various temperatures were determined by extrapolation techniques using the extrapolation function ½(cos 2 θ/sinθ + cos 2 θ/θ). The accurate value of the cell constant at room temperature is a O = 10.1194±0.0005 Å, at 30°C. From the sharpness of the high‐temperature photographs, it is concluded that no dissociation of In 2 O 3 powders takes place on heating in vacuum up to 968°C.