What is a fluoride of the cerium metals occurring in hexagonal crystals of a pale yellow color. Cf. Fluocerite called?
tysonite — A fluoride of the cerium metals occurring in hexagonal crystals of a pale yellow color. Cf. Fluocerite. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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