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Geosciences LibreTexts

16.10.05: Spectrolite

  • Page ID
    4311
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    Spectrolite
    Chemical composition Plagioclase feldspar
    Crystal system Triclinic
    Habit Aggregates
    Hardness 5-5.5
    Optic nature Biaxial +
    Refractive index 1.559-1.570
    Birefringence 0.008-0.011
    Dispersion Low
    Specific gravity 2.70
    Lustre Vitreous