Barentsite Mineral Data + Say BARENTSITE

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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 Synonym: Synonym: ICSD 77052
  PDF 35-693
 

Barentsite Image

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Barentsite

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: TriclinicSpace 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 Diaphaniety: Diaphaniety: 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 Gladstone-Dale: Gladstone-Dale: CI meas= 0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1801,KPDmeas= 0.178,KC= 0.1949
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:

relectron=2.48 gm/cc
note: rBarentsite =2.53 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00122
Boson Index = 0.99878
Help on Photoelectric: Photoelectric:

PEBarentsite = 0.86 barns/electron
U=PEBarentsite x relectron= 2.12 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: 13.1.8.1 (13)Acid Carbonates
  (13.1)with miscellaneous formulae
  (13.1.8)Dana Group
 
13.1.8.1 Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri
Help on  Strunz Class: Strunz Class: V/C.02-10 V - Nitrates, Carbonates and Borates
  V/C - Waterfree carbonates with unfamiliar anions
  V/C.02 - Barentsite - Tunisite series
 
V/C.02-10 Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri
 
V/C.02-20 Dawsonite NaAl(CO3)(OH)2 Imam 2/m 2/m 2/m
 
V/C.02-30 Tunisite NaCa2Al4(CO3)4(OH)8Cl P 4/nmm 4/m 2/m 2/m
 

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Barentsite

Na7AlH2(CO3)4F4
Dana No: 13.1.8.1 Strunz No: V/C.02-10
Locality:

 

Notes:

 

 
   
 
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