Synthesis and growth of fresnoite (Ba2TiSi2O8) from a TiO2 flux and its relation to the system BaTiO3-SiO2
- 1 March 1970
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
- Vol. 74A (2) , 229-232
- https://doi.org/10.6028/jres.074a.018
Abstract
Crystals of Ba2TiSi2O8 (synthetic fresnoite) up to 5 mm in longest dimension have been grown by slow cooling of a TiO2-rich liquid of initial composition 1BaO:1TiO2:1SiO2. The synthetic crystals are essentially identical to their mineral equivalent in morphology, cleavage, optical properties and unit cell dimensions. X-ray powder diffraction data previously reported for the compound BaTiSiO5 (“barium sphene”) is that of Ba2TiSi2O8. Apparently the compound BaTiSiO5 has never been synthesized and the system BaTiO3-SiO2 is not binary.Keywords
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