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Geosciences LibreTexts

16.35: Enstatite

  • Page ID
    4719
  • Enstatite

    Enstatite
    Chemical composition (Mg,Fe)SiO3

    Magnesium silicate

    Crystal system Orthorhombic
    Habit Crystals and waterworn pebbles
    Cleavage Distinct
    Fracture Sub-conchoidal
    Hardness 5.5
    Optic nature Biaxial +
    Refractive index 1.65-1.68
    Birefringence 0.010
    Dispersion Low, 0.010
    Specific gravity 3.3
    Lustre Vitreous
    Pleochroism Strong to moderate