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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. | ||
| Name Pronunciation: |
Magbasite + Pronunciation  |
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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 | ||
| Diaphaneity: |
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 Ncalc = 1.64 - 1.78 |
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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: |
Bulk Density (Electron Density)=3.27 gm/cc note: Specific Gravity of Magbasite =3.41 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.04 Boson Index = 0.96 |
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| Photoelectric: |
PEMagbasite = 66.10 barns/electron U=PEMagbasite x relectron= 216.02 barns/cc. |
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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: |
69.02.01c.01 (69)Inosilicate Chains with Side Branches or Loops | ||
| (69.02)with P>2 | |||
| (69.02.01c)Aenigmatite and related species (Magbasite subgroup) | |||
| Strunz Class: |
09.HA.25 09 - SILICATES (Germanates) | ||
| 09.H - Unclassified Silicates | |||
| 09.HA -With alkali and alkali-earth Elements | |||
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 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Magbasite using: Visit our Advertisers for Magbasite : A Bijoux Google Search for MagbasiteAdam's Minerals Google Search for Magbasite Cape Minerals Google Search for Magbasite Dakota Matrix Minerals Google Search for Magbasite Excalibur Mineral Corp. Google Search for Magbasite Exceptional Minerals Google Search for Magbasite John Betts Fine Minerals Search for Magbasite McDougall Minerals Google Search for Magbasite Mineral News Website Link Rock and Mineral Shows Google Search for Magbasite Weinrich Minerals, Inc. Google Search for Magbasite Ask about Magbasite here : Print or Cut-and-Paste your Magbasite Specimen Label here :
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- barely detectable