Magbasite Mineral Data

Magbasite Mineral Data
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General Magbasite Information

Help on Chemical Formula: Chemical Formula: KBa(Al,Sc)(Mg,Fe++)6Si6O20F2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: KBaAl0.75Sc0.25Mg4Fe2+2Si6O20F2
Help on Environment: Environment: Hydorthermal deposits.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Asian part of Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its composition of Mg, Ba, and Si.
Help on Name Pronunciation: Name Pronunciation: Magbasite + Pronunciation Say MAGBASITE
 

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Magbasite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.1898:1:0.279
Help on Cell Dimensions: Cell Dimensions: a = 22.56, b = 18.96, c = 5.29, Z = 6; V = 2,262.73 Den(Calc)= 4.15
Help on Crystal System: Crystal System: OrthorhombicSpace Group: P?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.2(1), 3.63(1), 2.59(0.8),
 

Physical Properties of Magbasite

Help on Color: Color: Colorless, Pink violet.
Help on Density: Density: 3.41
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Magbasite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.27 gm/cc
note: Specific Gravity of Magbasite =3.41 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEMagbasite = 66.10 barns/electron
U=PEMagbasite x relectron= 216.02 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 57.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Magbasite per GRapi unit = 1.74 (%)

Estimated Radioactivity from Magbasite - barely detectable

 

Magbasite Classification
Help on Dana Class: 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)
 
69.02.01c.01 Magbasite KBa(Al,Sc)(Mg,Fe)6Si6O20F2 P? Ortho
Help on Strunz Class: Strunz Class: 09.HA.25 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
 
09.HA.25 Magbasite KBa(Al,Sc)(Mg,Fe)6Si6O20F2 P? Ortho
 

Other Magbasite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Print or Cut-and-Paste your Magbasite Specimen Label here :

Magbasite

KBa(Al,Sc)(Mg,Fe++)6Si6O20F2
Dana No: 69.02.01c.01 Strunz No: 09.HA.25
Locality:

 

Notes: