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Further Consideration of Phases in the System Ba 2 SiO 4 –Ca 2 SiO 4
Author(s) -
Thompson John G.,
Withers Ray L.,
Hyde Bruce G.
Publication year - 1987
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.1151-2916.1987.tb04927.x
Subject(s) - hexagonal crystal system , crystallography , materials science , electron diffraction , phase (matter) , diffraction , x ray crystallography , mineralogy , chemistry , optics , physics , organic chemistry
The results of an investigation of the system Ba 2 SiO 4 –Ca 2 SiO 4 by powder X‐ray and electron diffraction suggest a greater complexity than supposed hitherto. The previously recognized phases α, α′ h α′ l , X, T, and the newly reported Y have room‐temperature structures that are modulated distortions of hexagonal (or pseudohexagonal) parent structures. Each displays characteristic and distinctive modulations. The phases are more readily distinguished in this way than by their unit‐cell dimensions and compositions which, for a given phase, can vary with bulk starting composition and thermal history.