“phthanite”的英文意思_释义_用法

单词

phthanite

释义

phthanite Min.|ˈfθænaɪt|
[a. F. phthanite: named by Haüy 1822 (phtanite), f. Gr. ϕθάν-ειν to anticipate + -ite¹, ‘because its thick schistoid texture and argillaceous character seem to announce beforehand its passage into schist’ (Traité de Mineral (ed. 2) IV. 546). Dana spells it -yte, as being the name not of a mineral but of a rock.]
A hard compact rock, consisting essentially of cryptocrystalline silica.
1868Dana Min. 195 Cryptocrystalline Varieties [of Quartz]..13. Basanite, Lydian Stone or Touchstone, a velvety black siliceous stone..passes into a compact fissile, siliceous, or flinty rock, of grayish and other colors, called siliceous slate, and also Phthanyte.

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