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Temperature Inversions of Anhydrous Gallium Orthophosphate
Author(s) -
PERLOFF ALVIN
Publication year - 1956
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.1151-2916.1956.tb15629.x
Subject(s) - tridymite , isostructural , anhydrous , cristobalite , hydrothermal circulation , gallium , aluminium phosphate , mineralogy , crystallography , chemistry , inorganic chemistry , materials science , chemical engineering , phosphate , crystal structure , metallurgy , quartz , organic chemistry , engineering
Crystalline GaPO 4 was prepared in a hydrothermal bomb at 200° to 300°C. It was found to be isostructural with the berlinite form of AlP04. Thermal analysis and high‐temperature X‐ray techniques were utilized to show that the analogy extends to some of the polymorphic forms of AlPO 4 as well. Three forms of GaPO 4 , corresponding to the berlinite, high‐cristobalite, and low‐cristobalite forms of the A1PO 4 system, were observed. No evidence was found to indicate the existence of a tridymite form.