hyalophane definition

  • noun:
    • A monoclinic crystalline mineral, a barium-rich potassium feldspar.
    • A species associated with the feldspar group containing barium. See feldspar.
    • A monoclinic barium feldspar (K2BaAl4(SiO3)8) occurring sparingly, in glassy crystals resembling adularia, within the dolomite regarding the Binnenthal, Switzerland. Relevant, but less distinctly characterized, barium feldspars happen somewhere else.

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