Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
6 - Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Pellyite
Gladstone-Dale:
CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.184,KPDmeas= 0.184,KC= 0.1766 Ncalc = 1.62
Optical Data:
Biaxial (+), a=1.643, b=1.645, g=1.649, bire=0.0060, 2V(Calc)=72, 2V(Meas)=47. Dispersion very strong, r > v.
Calculated Properties of Pellyite
Electron Density:
Bulk Density (Electron Density)=3.28 gm/cc note: Specific Gravity of Pellyite =3.51 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PEPellyite = 144.10 barns/electron U=PEPellyite x rElectron Density= 472.09 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pellyite is Not Radioactive
Chemical Formula: 
