Magbasite Mineral Data + 
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- 69.2.1c.1 Magbasite KBa(Al,Sc)(Mg,Fe)6Si6O20F2 P? Ortho
- VIII/C.32-10 Magbasite KBa(Al,Sc)(Mg,Fe)6Si6O20F2 P? Ortho
General Magbasite Information |
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 Chemical Formula: |
KBa(Al,Sc)(Mg,Fe++)6Si6O20F2 | ||
| Composition: |
Molecular Weight = 943.31 gm | ||
| Potassium 4.14 % K 4.99 % K2O | |||
| Barium 14.56 % Ba 16.25 % BaO | |||
| Magnesium 10.31 % Mg 17.09 % MgO | |||
| Scandium 1.19 % Sc 1.83 % Sc2O3 | |||
| Aluminum 2.15 % Al 4.05 % Al2O3 | |||
| Iron 11.84 % Fe 15.23 % FeO | |||
| Silicon 17.86 % Si 38.22 % SiO2 | |||
| Oxygen 33.92 % O | |||
| Fluorine 4.03 % F 4.03 % F | |||
| - % F -1.70 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
KBaAl0.75Sc0.25Mg4Fe2+2Si6O20F2 | ||
| Environment: |
Hydorthermal deposits. | ||
| IMA Status: |
Approved IMA 1965 | ||
| Locality: |
Asian part of Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after its composition of Mg, Ba, and Si. | ||
Search for Magbasite Images | |||
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Images:
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Magbasite 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: |
OrthorhombicSpace Group: P? | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.2(1), 3.63(1), 2.59(0.8), | ||
Physical Properties of Magbasite |
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| Color: |
Colorless, Pink violet. | ||
| Density: |
3.41 | ||
| Diaphaniety: |
Transparent | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Hardness: |
5 - Apatite | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Magbasite |
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| Gladstone-Dale: |
CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.222 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1463,KPDmeas= 0.178,KC= 0.1879 |
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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. | ||
Calculated Properties of Magbasite |
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| Electron Density: |
relectron=3.27 gm/cc |
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| Fermion Index |
Fermion Index = 0.04727 Boson Index = 0.95273 |
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| Photoelectric: |
PEMagbasite = 66.10 barns/electron |
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| Radioactivity: |
GRapi = 57.32 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Magbasite |
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Magbasite Classification |
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| Dana Class: |
69.2.1c.1 (69)Inosilicate Chains with Side Branches or Loops | ||
| (69.2)with P>2 | |||
| (69.2.1c)Aenigmatite and related species (Magbasite subgroup) | |||
| Strunz Class: |
VIII/C.32-10 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si3O10]8- groups | |||
| VIII/C.32 - Magbasite series | |||
Other Magbasite 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 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Magbasite using: Visit our Advertisers for Magbasite : Translate Magbasite Mineral Data : Ask about Magbasite here : Print or Cut-and-Paste your Magbasite Specimen Label here :
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- barely detectable 
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