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Barentsite Mineral Data
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General Barentsite Information
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 Chemical Formula: |
Na7AlH2(CO3)4F4 |
| Composition: |
Molecular Weight = 505.96 gm |
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Sodium 31.81 % Na 42.87 % Na2O |
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Aluminum 5.33 % Al 10.08 % Al2O3 |
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Hydrogen 0.40 % H 3.56 % H2O |
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Carbon 9.50 % C 34.79 % CO2 |
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Oxygen 37.95 % O |
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Fluorine 15.02 % F 15.02 % F |
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- %
F -6.32 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na7AlH2(CO3)4F4 |
| Environment: |
Drill core in pegmatitic rock. |
| IMA Status: |
Approved IMA 1983 |
| Locality: |
Mt. Restinyon, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named to honor Dutch sailor Willem Barents and the sea that washes the Kola Peninsula. |
| Name Pronunciation: |
Barentsite + Pronunciation  |
| Synonym: |
ICSD 77052 |
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PDF 35-693 |
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Barentsite Image |
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Images:
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Barentsite Crystallography
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| Axial Ratios: |
a:b:c =0.9609:1:1.3074 |
| 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 |
| Crystal System: |
Triclinic Space Group: P1 or P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.658(1), 2.778(1), 2.887(0.84), |
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Physical Properties of Barentsite
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| Cleavage: |
{001} Perfect, {100} Perfect |
| Color: |
Colorless. |
| Density: |
2.56 |
| Diaphaneity: |
Transparent |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Hardness: |
3 - Calcite |
| Luster: |
Vitreous - Pearly |
| Streak: |
white |
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Optical Properties of Barentsite
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| 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. |
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Calculated Properties of Barentsite
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| Electron Density: |
Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Barentsite =2.55 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0012272661
Boson Index = 0.9987727339 |
| Photoelectric: |
PEBarentsite = 0.86 barns/electron
U=PEBarentsite x rElectron Density= 2.14 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barentsite is Not Radioactive |
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Barentsite Classification
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| Dana Class: |
13.01.08.01 (13)Acid Carbonates |
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(13.01)with miscellaneous formulae |
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(13.01.08)Dana Group |
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13.01.08.01 Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri |
| Strunz Class: |
05.BB.05 05 - CARBONATES (NITRATES) |
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05.B - Carbonates with additional anions, without H2O |
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05.BB -With alkalies, etc. |
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05.BB.05 Barentsite Na7AlH2(CO3)4F4 P1 or P1 Tri |
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Other Barentsite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Barentsite Specimen Label here :
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Barentsite
Na7AlH2(CO3)4F4
Dana No: 13.01.08.01 Strunz No: 05.BB.05
Locality:
Notes:
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