General Information
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| Chemical Formula: |
(Na,Ca,Fe++)(Sc,Mg,Fe++)Si2O6 |
| IMA Status: |
Approved IMA |
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Classification
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| Dana Class: |
65.1.3c.6 (65)Single-Width Unbranched Chains, W=1 (65.1)with chains P=2 (65.1.3c)C2/c clinopyroxenes (Na clinopyroxenes) |
| Strunz Class: |
VIII/F.01-150 - Silicates [Inosilicates (chain and band) double chains [Si2O6]4- (Pyroxene group, Clinopyroxene).] |
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Crystallography
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| Axial Ratios: |
a:b:c =1.0896:1:0.5874 |
| Cell Dimensions: |
a = 9.853, b = 9.042, c = 5.312, Z = 4; beta = 106.62ø V = 453.48 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C2/c |
| X Ray Diffraction: |
By Intensity(I/Io): 3.038(1) 2.543(0.75) 2.979(0.75) |
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Physical Properties
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| Cleavage: |
[110] Perfect |
| Color: |
light green. |
| Density: |
3.22 |
| Diaphaniety: |
Transparent to Translucent |
| Hardness: |
6-7 - Orthoclase-Quartz |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Biaxial (-), a=1.683, b=1.715, g=1.724, bire=0.0410 |
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Other Information
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
 Athena Mineralogy |
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Frederic Biret |
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Google |
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MinMax |
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École des Mines de Paris |
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