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Physical Properties of Alstonite
Cleavage:
{110} Imperfect
Color:
Colorless, Gray, White, Pink.
Density:
3.69 - 3.71, Average = 3.7
Diaphaneity:
Transparent to translucent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Pseudo Hexagonal - Crystals show a hexagonal outline.
Hardness:
4-4.5 - Between Fluorite and Apatite
Luminescence:
Fluorescent, Long UV=weak yellow.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Alstonite
Gladstone-Dale:
CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1675,KPDmeas= 0.1684,KC= 0.168 Ncalc = 1.62 - 1.63
Optical Data:
Biaxial (-), a=1.526, b=1.671, g=1.672, bire=0.1460, 2V(Calc)=8, 2V(Meas)=6. Dispersion r > v weak.
Calculated Properties of Alstonite
Electron Density:
Bulk Density (Electron Density)=3.38 gm/cc note: Specific Gravity of Alstonite =3.70 gm/cc.
Fermion Index:
Fermion Index = 0.08 Boson Index = 0.92
Photoelectric:
PEAlstonite = 204.28 barns/electron U=PEAlstonite x rElectron Density= 691.22 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Alstonite is Not Radioactive
Chemical Formula: 
