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Physical Properties of Barite
Cleavage:
{010} Perfect, {210} Perfect, {010} Imperfect
Color:
White, Yellowish white, Grayish white, Brownish white, Dark brown.
Density:
4.48
Diaphaneity:
Transparent to translucent to opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
Phosphorescent.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Barite
Gladstone-Dale:
CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1428,KPDmeas= 0.1428,KC= 0.1448 Ncalc = 1.65
Optical Data:
Biaxial (+), a=1.634-1.637, b=1.6355-1.638, g=1.646-1.648, bire=0.0110-0.0120, 2V(Calc)=36-42, 2V(Meas)=36-40. Dispersion weak, r < v.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Calculated Properties of Barite
Electron Density:
Bulk Density (Electron Density)=3.99 gm/cc note: Specific Gravity of Barite =4.48 gm/cc.
Fermion Index:
Fermion Index = 0.1 Boson Index = 0.9
Photoelectric:
PEBarite = 265.56 barns/electron U=PEBarite x rElectron Density=1,060.27 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Barite is Not Radioactive
Chemical Formula: 
