Cinnabar

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Cinnabar

Cinnabar on Dolomite
General
Category Mineral
Chemical formula mercury(II) sulfide, HgS
Identification
Color Brownish-red
Crystal habit Rhombohedral to tabular. Granular to massive
Crystal system Trigonal – Trapezohedral
Cleavage Prismatic, perfect
Fracture Uneven to subconchoidal
Mohs scale hardness 2-2.5
Luster Adamantine to dull
Streak Scarlet
Specific gravity 8.176
Optical properties Uniaxial (+)
Refractive index nω = 2.905 nε = 3.256
Birefringence δ = 0.351
Solubility 1.04 x 10-25 g per 100 ml water (Ksp at 25 °C = 2 x 10-32)[1]
References [2][3][4]

Cinnabar


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Meyers, J., Chem. Ed. 63: 689, 1986 
  2. Mineral Handbook
  3. Mindat
  4. Webmineral