General Information
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 Chemical Formula: |
KBa(Al,Sc)(Mg,Fe++)6Si6O20F2 |
| Composition: |
Molecular Weight = 943.31 gm) |
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| Empirical Formula: |
KBaAl0.75Sc0.25Mg4Fe2+2Si6O20F2 |
| Environment: |
Hydorthermal deposits. |
| IMA Status: |
Approved IMA 1965 |
| Locality: |
Asian part of Russia. |
| Name Origin: |
Named after its composition of Mg, Ba, and Si. |
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Classification
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| Dana Class: |
69.2.1c.1 (69)Inosilicate Chains with Side Branches or Loops |
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(69.2)with P>2 |
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(69.2.1c)Aenigmatite and related species (Magbasite subgroup) |
| Strunz Class: |
VIII/C.32-10 VIII - Silicates |
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VIII/C - Sorosilicates with [Si3O10]8- groups |
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VIII/C.32 - Magbasite series |
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Crystallography
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| Axial Ratios: |
a:b:c =1.1898:1:0.279 |
| Cell Dimensions: |
a = 22.56, b = 18.96, c = 5.29, Z = 6; V = 2,262.73 Den(Calc)= 4.15 |
| Crystal System: |
Orthorhombic Space Group: P? |
| X Ray Diffraction: |
By Intensity(I/Io): 3.2(1) 3.63(1) 2.59(0.8) |
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Physical Properties
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| Color: |
colorless or pink violet. |
| Density: |
3.41 |
| Diaphaniety: |
Transparent |
| Habits: |
Fibrous - Crystals made up of fibers., , |
| Hardness: |
5 - Apatite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Biaxial (-), a=1.597, b=1.609, g=1.615, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70. |
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Other Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Magbasite :
1 -Athena Mineralogy
2 - EUROmin Project
3 -MinDat.org Location Data
4 -MinMax
5 -École des Mines de Paris
Search for Magbasite using:
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[MSN.COM]
[NORTHERN LIGHT]
[YAHOO]
Visit our Advertisers for Magbasite :
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Ask about Magbasite here :
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Bob's Rockshop Rock Net Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Ask-A-Mineralogist from the Mineralogical Society of America
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