Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
brown
Optical Properties of Orientite
Gladstone-Dale:
CI meas= -0.07 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2205,KPDmeas= 0.2588,KC= 0.2419 Ncalc = 1.73 - 1.85
Optical Data:
Biaxial (+), a=1.758, b=1.776, g=1.795, bire=0.0370, 2V(Calc)=90, 2V(Meas)=68-83. Dispersion r > v very strong.
Pleochroism (x):
colorless or pale yellow.
Pleochroism (y):
reddish brown or yellowish brown.
Pleochroism (z):
yellowish brown or deep brown.
Calculated Properties of Orientite
Electron Density:
Bulk Density (Electron Density)=2.94 gm/cc note: Specific Gravity of Orientite =3.00 gm/cc.
Fermion Index:
Fermion Index = 0.0074492774 Boson Index = 0.9925507226
Photoelectric:
PEOrientite = 9.87 barns/electron U=PEOrientite x rElectron Density= 29.01 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Orientite is Not Radioactive
Orientite Classification
Dana Class:
58.03.01.02(58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
(58.03)with insular single and triple groups (n=1,3)
Chemical Formula: 
