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单词 plagioclase feldspar
释义

plagioclase feldspar


pla·gi·o·clase feldspar

P0344600 (plā′jē-ə-klās′, -klāz′, plăj′ē-)n. Any of a series of triclinic feldspars that are a common constituent of rocks, consisting primarily of a mixture of sodium aluminum silicate, NaAlSi3O8, and calcium aluminum silicate, CaAl2Si2O8.
[Greek plagio-, plagio- + Greek klasis, breaking (from its oblique cleavage) (from klān, to break).]

plagioclase feldspar


plagioclase feldspar

(plā`jēəklās'): see feldsparfeldspar
or felspar
, an abundant group of rock-forming minerals which constitute 60% of the earth's crust. Chemically the feldspars are silicates of aluminum, containing sodium, potassium, iron, calcium, or barium or combinations of these elements.
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