General Information
|
Chemical Formula: |
(Na,Ca,Fe++)(Sc,Mg,Fe++)Si2O6 |
IMA Status: |
Approved IMA |
| |
Classification
|
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).] |
| |
Crystallography
|
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) |
| |
Physical Properties
|
Cleavage: |
[110] Perfect |
Color: |
light green. |
Density: |
3.22 |
Diaphaniety: |
Transparent to Translucent |
Hardness: |
6-7 - Orthoclase-Quartz |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
| |
Optical Properties
|
Optical Data: |
Biaxial (-), a=1.683, b=1.715, g=1.724, bire=0.0410 |
| |
Other Information
|
References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Athena Mineralogy |
|
Frederic Biret |
|
Google |
|
MinMax |
|
École des Mines de Paris |
| |
|
|
| |