Mineralogy Database

Knasibfite Mineral Data

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General Knasibfite Information

Help on Chemical  Formula: Chemical Formula: K3Na4[SiF6]3[BF4]
Help on Composition: Composition: Molecular Weight = 723.72 gm
   Potassium  16.69 %  K    20.11 % K2O
   Sodium     13.06 %  Na   17.60 % Na2O
   Silicon    11.29 %  Si   24.16 % SiO2
   Boron       1.49 %  B     4.81 % B2O3
   Fluorine   57.46 %  F    57.46 % F
                -   %   F   -24.20 % -O=F2    
             ______        ______ 
             100.00 %       99.94 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3.09Na4.11Si2.91BF21.89
Help on Environment: Environment: Low temperature fumarole.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the chemical compostion (K-Na-Si-B-F).
Help on Synonym: Synonym: IMA2006-042

Knasibfite Image

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Comments: SEM image of knasibfite crystals (CanMin; v46:449).
Location: La Fossa crater, Vulcano Island, Aeolian Archipelago, Sicily, Italy. Scale: See Image.
© Canadian Mineralogist

Knasibfite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3225:1:0.5367
Help on Cell Dimensions: Cell Dimensions: a = 5.521, b = 17.115, c = 9.186, Z = 2; V = 868.00 Den(Calc)= 2.77
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Imm2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.558(0.5)(020), 8.107(0.25)(011), 4.044(1)(022),3.175(0.3)(141), 2.28(0.5)(222), 2.094(0.25)(251),

Physical Properties of Knasibfite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.75
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: shite

Calculated Properties of Knasibfite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Knasibfite =2.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082662627
Boson Index = 0.9917337373
Help on Photoelectric: Photoelectric: PEKnasibfite = 2.66 barns/electron
U=PEKnasibfite x relectron= 7.07 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 230.75 (Gamma Ray American Petroleum Institute Units)
Concentration of Knasibfite per GRapi unit = 0.43 (%)

Estimated Radioactivity from Knasibfite - barely detectable


Knasibfite Classification

Help on  Dana Class: Dana Class: (12)Compound Halides
  (12.01)with miscellaneous anions
  (12.01.11)Dana Group Knasibfite! K3Na4[SiF6]3[BF4] Imm2 mm2
Help on  Strunz Class: Strunz Class: 03.CH.25 03 - HALIDES
  03.C - Complex Halides
  03.CH -
03.CH.25 Knasibfite! K3Na4[SiF6]3[BF4] Imm2 mm2

Other Knasibfite Information

Help on References: References: NAME( AmMin, v93:1943) PHYS. PROP.(AmMin, v93:1943) OPTIC PROP.(AmMin, v93:1943)
Help on See Also: See Also: Links to other databases for Knasibfite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 03.CH.25





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