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Bogvadite Mineral Data
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General Bogvadite Information
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 Chemical Formula: |
Na2SrBa2Al4F20 |
| Composition: |
Molecular Weight = 896.15 gm |
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Barium 30.65 % Ba 34.22 % BaO |
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Sodium 5.13 % Na 6.92 % Na2O |
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Strontium 9.78 % Sr 11.56 % SrO |
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Aluminum 12.04 % Al 22.76 % Al2O3 |
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Fluorine 42.40 % F 42.40 % F |
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- %
F -17.85 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na2SrBa2Al4F20 |
| IMA Status: |
Approved IMA 1988 |
| Locality: |
Ivigtut, Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Richard Bogvad (1952-), Danish, former chief geologist of the cryolite mining company. |
| Name Pronunciation: |
Bogvadite + Pronunciation  |
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Bogvadite Crystallography
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| Axial Ratios: |
a:b:c =0.3571:1:0.2685 |
| Cell Dimensions: |
a = 7.11, b = 19.907, c = 5.347, Z = 2; V = 756.81 Den(Calc)= 3.93 |
| Crystal System: |
Orthorhombic Space Group: Pnmn,Pn2n |
| X Ray Diffraction: |
By Intensity(I/Io): 3.2403(1), 2.9241(0.5), 3.1945(0.5), |
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Physical Properties of Bogvadite
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| Color: |
Colorless. |
| Density: |
3.85 |
| Diaphaneity: |
Transparent |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Blocky - Crystal shape tends to be equant (e.g. feldspars). |
| Hardness: |
4 - Fluorite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Bogvadite
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| Optical Data: |
Biaxial (-), a=1.433, b=1.436, g=1.4389, bire=0.0059, 2V(Calc)=88, 2V(Meas)=87. |
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Calculated Properties of Bogvadite
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| Electron Density: |
Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Bogvadite =3.93 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEBogvadite = 148.38 barns/electron
U=PEBogvadite x rElectron Density= 525.76 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bogvadite is Not Radioactive |
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Bogvadite Classification
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| Dana Class: |
11.06.20.01 (11)Halide Complexes; Alumino-fluorides |
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(11.06)with miscellaneous formulae |
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(11.06.20)Dana Group |
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11.06.20.01 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho |
| Strunz Class: |
03.CF.15 03 - HALIDES |
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03.C - Complex Halides |
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03.CF -Tekto-aluminofluorides |
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03.CF.15 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho |
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Other Bogvadite Information
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| References: |
NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19) |
| See Also: |
Links to other databases for Bogvadite :
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 Bogvadite Specimen Label here :
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Bogvadite
Na2SrBa2Al4F20
Dana No: 11.06.20.01 Strunz No: 03.CF.15
Locality:
Notes:
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