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Physical Properties of Aegirine
Cleavage:
{???} Distinct, {???} Distinct
Color:
Green, Greenish black, Reddish brown, Black.
Density:
3.5 - 3.54, Average = 3.52
Diaphaneity:
Subtransparent to translucent to opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Acicular - Occurs as needle-like crystals.
Hardness:
6-6.5 - Orthoclase-Pyrite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Resinous
Streak:
yellowish gray
Optical Properties of Aegirine
Gladstone-Dale:
CI meas= 0.092 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.109 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.216,KPDmeas= 0.2203,KC= 0.2426 Ncalc = 1.85 - 1.87
Optical Data:
Biaxial (-), a=1.72-1.778, b=1.74-1.819, g=1.757-1.839, bire=0.0370-0.0610, 2V(Calc)=68-84, 2V(Meas)=60-90. Dispersion r > v.
Pleochroism (x):
olive green, pale green, pale bluish green, dark grass green, or deep green.
Pleochroism (y):
light bluish green, yellowish green, grass green, or emerald green.
Pleochroism (z):
yellowish green, honey yellow, or light yellow.
Calculated Properties of Aegirine
Electron Density:
Bulk Density (Electron Density)=3.44 gm/cc note: Specific Gravity of Aegirine =3.52 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEAegirine = 8.29 barns/electron U=PEAegirine x rElectron Density= 28.56 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Aegirine is Not Radioactive
Chemical Formula: 
