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Hawthorne F C , Neues Jahrbuch fur Mineralogie, Monatshefte , 1987 (1987) p.16-30, The crystal chemistry of the benitoite group minerals and, structural relations in (Si3O9) ring structures, Sample: occurs in small fractures and as scattered grains in, recrystallized siliceous limestone at Santa Cruz, Ca
Physical Properties of Pabstite
Color:
Colorless, White.
Density:
4.03
Diaphaneity:
Transparent to Translucent
Habit:
Anhedral Grains - Granular minerals without the expression of crystal shapes
Hardness:
6 - Orthoclase
Luminescence:
Fluorescent, Short UV=bright blue.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Pabstite
Dichroism (e):
colorless.
Dichroism (w):
colorless.
Gladstone-Dale:
CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1678,KPDmeas= 0.1686,KC= 0.1739 Ncalc = 1.7
Optical Data:
Uniaxial (-), e=1.674, w=1.685, bire=0.0110.
Calculated Properties of Pabstite
Electron Density:
Bulk Density (Electron Density)=3.68 gm/cc note: Specific Gravity of Pabstite =4.03 gm/cc.
Fermion Index:
Fermion Index = 0.09 Boson Index = 0.91
Photoelectric:
PEPabstite = 187.97 barns/electron U=PEPabstite x rElectron Density= 691.62 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pabstite is Not Radioactive