Role of Cuspidine (3CaO.2SiO2.CaF2) in the System CaO–SiO2–CaF2
- 1 May 1957
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 40 (5) , 174-178
- https://doi.org/10.1111/j.1151-2916.1957.tb12598.x
Abstract
Cuspidine is a well‐defined ternary compound with a stability field in the subsystem CaF2–CaSiO3–Ca2SiO4. Cuspidine is easily formed by solid‐state reactions in the subsystem mentioned and is stable above its apparently congruent fusion point if heated in welded platinum containers. Above 1450° decomposition and the formation of a mixture of CaF2 and Ca2SiO4 is observed. Cuspidine also is easily formed by secondary reactions in solid mixtures of the subsystem CaF2–CaSiO3 and in ternary mixtures of these with free SiO2 if heated in open crucibles. The existence of double compounds of CaF2 and CaSiO3 is not confirmed.Keywords
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