Definitions
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noun (plural: albites)
  1. (mineralogy) A plagioclase feldspar, the first member of the Albite-Anorthite solid solution series. Primarily a mineral of plutonic rocks, also found in pegmatites. When Albite substitutes for a potassium feldspar in granite, the rock is called quartz monzonite.
  • Chemical composition: Sodium aluminum silicate, <math>NaAlSi?_3O_8</math>
  • Physical properties:
    Moh's Hardness: 6.0
    Specific gravity: 2.63
    Color: white, sometimes with a bluish cast
    Luster: glassy
    Fracture: conchoidal
    Cleavage: two good at about 94º to each other
  • Habit: Triclinic - pinacoidal. Usually twinned and striated. The striations are visible to the naked eye, and are characteristic of plagioclase feldspars in general and Albite in particular.
Etymology: From the Latin albus (white), the common color of the mineral.


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