Mineralogy Database

Barentsite Mineral Data

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General Barentsite Information

Help on Chemical  Formula: Chemical Formula: Na7AlH2(CO3)4F4
Help on Composition: Composition: Molecular Weight = 505.96 gm
   Sodium    31.81 %  Na   42.87 % Na2O
   Aluminum   5.33 %  Al   10.08 % Al2O3
   Hydrogen   0.40 %  H     3.56 % H2O
   Carbon     9.50 %  C    34.79 % CO2
   Oxygen    37.95 %  O
   Fluorine  15.02 %  F    15.02 % F
               -   %   F    -6.32 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na7AlH2(CO3)4F4
Help on Environment: Environment: Drill core in pegmatitic rock.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Mt. Restinyon, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to honor Dutch sailor Willem Barents and the sea that washes the Kola Peninsula.
Help on Name Pronunciation: Name Pronunciation: Barentsite + Pronunciation Say BARENTSITE
Help on Synonym: Synonym: ICSD 77052
  PDF 35-693

Barentsite Image

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Comments: White, powdery barentsite.
Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Barentsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9609:1:1.3074
Help on Cell Dimensions: Cell Dimensions: a = 6.472, b = 6.735, c = 8.806, Z = 1; alpha = 92.5°, beta = 97.33°, gamma = 119.32° V = 331.62 Den(Calc)= 2.53
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.658(1), 2.778(1), 2.887(0.84),

Physical Properties of Barentsite

Help on Cleavage: Cleavage: {001} Perfect, {100} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 2.56
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Barentsite

Help on Optical Data: Optical Data: Biaxial (-), a=1.358, b=1.479, g=1.53, bire=0.1720, 2V(Calc)=60, 2V(Meas)=62. Dispersion r < v weak.

Calculated Properties of Barentsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Barentsite =2.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012272661
Boson Index = 0.9987727339
Help on Photoelectric: Photoelectric: PEBarentsite = 0.86 barns/electron
U=PEBarentsite x rElectron Density= 2.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barentsite is Not Radioactive

Barentsite Classification

Help on  Dana Class: Dana Class: (13)Acid Carbonates
  (13.01)with miscellaneous formulae
  (13.01.08)Dana Group Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 05.BB.05 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BB -With alkalies, etc.
05.BB.05 Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri

Other Barentsite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Barentsite :
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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Dana No: Strunz No: 05.BB.05





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