Bogvadite Mineral Data + 
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- 11.6.20.1 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho
- III/B.03-10 Cryolithionite Na3Li3Al2F12 I a3d 4/m 3 2/m
- III/B.03-20 Colquiriite CaLiAlF6 P 3c 3 2/m
- III/B.03-25 Simmonsite! Na2LiAlF6 P 21/n 2/m
- III/B.03-30 Cryolite Na3AlF6 P 21/n 2/m
- III/B.03-40 Elpasolite K2NaAlF6 F m3m 4/m 3 2/m
- III/B.03-45 Bogvadite Na2SrBa2Al4F20 Pnmn,Pn2n Ortho
- III/B.03-48 Jorgensenite! Na2(Sr,Ba)14Na2Al12F64(OH,F) C 2/m 2/m
- III/B.03-50 Jarlite Na(Sr,Na,[])7(Mg,[])Al6F32(OH,H2O)2 C 2/m 2/m
- III/B.03-60 Calcjarlite Na(Ca,Sr)3Al3(F,OH)16 C 2/m 2/m
General Bogvadite Information |
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 Chemical Formula: |
Na2SrBa2Al4F20 | ||
| Composition: |
Molecular Weight = 896.15 gm | ||
| Barium 30.65 % Ba 34.22 % BaO | |||
| Sodium 5.13 % Na 6.92 % Na2O | |||
| Strontium 9.78 % Sr 11.56 % SrO | |||
| Aluminum 12.04 % Al 22.76 % Al2O3 | |||
| Fluorine 42.40 % F 42.40 % F | |||
| - % F -17.85 % -O=F2 | |||
| ______ ______ | |||
| 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. | ||
Search for Bogvadite Images | |||
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Images:
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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: |
OrthorhombicSpace Group: Pnmn,Pn2n | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.2403(1), 2.9241(0.5), 3.1945(0.5), | ||
Physical Properties of Bogvadite |
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| Color: |
Colorless. | ||
| Density: |
3.85 | ||
| Diaphaniety: |
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 | ||
Optical Properties of Bogvadite |
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| Gladstone-Dale: |
CI meas= 0.195 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.212 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1109,KPDmeas= 0.1132,KC= 0.1407 |
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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. | ||
Calculated Properties of Bogvadite |
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| Electron Density: |
relectron=3.47 gm/cc |
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| Fermion Index |
Fermion Index = 0.06146 Boson Index = 0.93854 |
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| Photoelectric: |
PEBogvadite = 148.38 barns/electron |
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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: |
11.6.20.1 (11)Halide Complexes; Alumino-fluorides | ||
| (11.6)with miscellaneous formulae | |||
| (11.6.20)Dana Group | |||
| Strunz Class: |
III/B.03-45 III - Halogenides | ||
| III/B - Double halogenides without water, with [BF4]1-,[SiF6]2- and [AlF6]3- | |||
| III/B.03 - Kryolithionite - Calcjarlite series | |||
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 -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 -École des Mines de Paris Search for Bogvadite using: Visit our Advertisers for Bogvadite : Translate Bogvadite Mineral Data : Ask about Bogvadite here : Print or Cut-and-Paste your Bogvadite Specimen Label here :
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