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Physical Properties of Diaboleite
Cleavage:
{001} Perfect
Color:
Dark blue, Bright sky blue.
Density:
5.48 - 6.41, Average = 5.94
Diaphaneity:
Transparent to Translucent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Hardness:
2.5 - Finger Nail
Luster:
Adamantine
Streak:
blue
Optical Properties of Diaboleite
Dichroism (e):
pale blue or pale bluish white.
Dichroism (w):
deep blue or deep blue.
Gladstone-Dale:
CI meas= 0.143 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1691,KPDmeas= 0.1539,KC= 0.1796 Ncalc = 1.97 - 2.15
Optical Data:
Uniaxial (-), e=1.85, w=1.98, bire=0.1300.
Calculated Properties of Diaboleite
Electron Density:
Bulk Density (Electron Density)=4.61 gm/cc note: Specific Gravity of Diaboleite =5.41 gm/cc.
Fermion Index:
Fermion Index = 0.14 Boson Index = 0.86
Photoelectric:
PEDiaboleite =1,215.36 barns/electron U=PEDiaboleite x rElectron Density=5,606.43 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Diaboleite is Not Radioactive
Chemical Formula: 
