General Information
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| Chemical Formula: |
Ca2(Fe2+,Mn)ScSi5O14(OH) |
| IMA Status: |
Approved IMA |
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Classification
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| Dana Class: |
78.0.0.0 (78)Unclassified Silicate Minerals (78.0)Without Dana Classification Numbers (Unknown) |
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Crystallography
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| Axial Ratios: |
a:b:c =0.6422:1:0.575 |
| Cell Dimensions: |
a = 7.536, b = 11.734, c = 6.748, Z = 2; alpha = 91.7ø, beta = 93.86ø, gamma =
104.53ø V = 576.06 |
| Crystal System: |
Triclinic - Pinacoidal H-M
Symbol ( -1) Space Group: P1- |
| X Ray Diffraction: |
By Intensity(I/Io): 2.895(1) 2.969(1)
2.755(0.7) |
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Physical Properties
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| Color: |
gray. |
| Density: |
3.24 |
| Diaphaniety: |
Transparent |
| Hardness: |
6 - Orthoclase |
| Luster: |
Vitreous (Glassy) |
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Optical Properties
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| Optical Data: |
Biaxial (+), a=1.686, b=1.694, g=1.709, bire=0.0230 |
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Other Information
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| References: |
PHYS. PROP.(Am.Min.,Vol.83,p1330-1334,1998) OPTIC
PROP.(Am.Min.,Vol.83,p1330-1334,1998) |
| See Also: |
 Frederic Biret |
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Google |
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MinMax
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