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Physical Properties of Braunite-I
Cleavage:
{111} Perfect
Color:
Grayish black, Brownish gray, Dark brownish black.
Density:
4.72 - 4.82, Average = 4.76
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
6-6.5 - Orthoclase-Pyrite
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Magnetism:
Nonmagnetic
Streak:
brownish gray black
Optical Properties of Braunite-I
Optical Data:
NCalc= 2.37 - from Gladstone-Dale relationship (KC = 0.2796) where Ncalc=Dcalc*KC+1 NCalc= 2.33 - from Gladstone-Dale relationship (KC = 0.2796) where Ncalc=Dmeas*KC+1
Calculated Properties of Braunite-I
Electron Density:
Bulk Density (Electron Density)=4.61 gm/cc note: Specific Gravity of Braunite-I =4.89 gm/cc.
Fermion Index:
Fermion Index = 0.0023216105 Boson Index = 0.9976783895
Photoelectric:
PEBraunite-I = 16.86 barns/electron U=PEBraunite-I x rElectron Density= 77.73 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Braunite-I is Not Radioactive
Chemical Formula: 
