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Domeneghetti M C , Molin G M , Stimpfl M , Tribaudino M , American Mineralogist , 80 (1995) p.923-929, Orthopyroxene from the Serra de Mage meteorite: Structure refinement and, estimation of C2/c pyroxene contributions to apparent Pbca diffraction, violations, Sample: OPX SDM N.13, natural
View Additional jPOWD Structure files for Hypersthene
[1]
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Silky
Streak:
grayish greenish white
Optical Properties of Hypersthene
Gladstone-Dale:
CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1949,KPDmeas= 0.2025,KC= 0.2004 Ncalc = 1.64 - 1.78
Optical Data:
Biaxial (-), a=1.669-1.755, b=1.674-1.763, g=1.68-1.773, bire=0.0110-0.0180, 2V(Calc)=86, 2V(Meas)=70-90. Dispersion weak, r < v.
Pleochroism (x):
pink, brownish pink, pale yellow, pale red, or colorless.
Pleochroism (y):
pinkish yellow, greenish yellow, yellow, light green, or colorless.
Calculated Properties of Hypersthene
Electron Density:
Bulk Density (Electron Density)=3.48 gm/cc note: Specific Gravity of Hypersthene =3.55 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEHypersthene = 8.29 barns/electron U=PEHypersthene x rElectron Density= 28.88 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hypersthene is Not Radioactive