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Ingram L , Taylor H F W , Mineralogical Magazine , 36 (1967) p.465-479, The crystal structures of sjoegrenite and pyroaurite, Locality: Sweden
Physical Properties of Pyroaurite
Cleavage:
{0001} Perfect
Color:
Brownish yellow, Brown white, Colorless, Greenish, Yellowish white.
Density:
2.07
Diaphaneity:
Transparent
Fracture:
Flexible - Flexible fragments.
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
2.5 - Finger Nail
Luster:
Pearly
Streak:
white
Optical Properties of Pyroaurite
Gladstone-Dale:
CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2599,KPDmeas= 0.2674,KC= 0.2742 Ncalc = 1.57 - 1.58
Optical Data:
Uniaxial (-), e=1.543, w=1.564, bire=0.0210.
Calculated Properties of Pyroaurite
Electron Density:
Bulk Density (Electron Density)=2.11 gm/cc note: Specific Gravity of Pyroaurite =2.07 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEPyroaurite = 5.43 barns/electron U=PEPyroaurite x rElectron Density= 11.48 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pyroaurite is Not Radioactive