Bariandite Mineral Data + 
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- 47.3.2.1 Straczekite (Ca,K,Ba)2V8O20·3(H2O) C 2/m 2/m
- 47.3.2.2 Corvusite (Na,Ca,K)V8O20·4(H2O) C 2/m 2/m
- 47.3.2.3 Fernandinite CaV8O20·4(H2O) C 2/m 2/m
- 47.3.2.4 Bariandite Al0.6V8O20·9(H2O) C 2/c 2/m
- 47.3.2.5 Bokite (Al,Fe)1.3(V,Fe)8O20·4.7(H2O) C 2/m 2/m
- 47.3.2.6 Kazakhstanite Fe5V3V12O39·8.5(H2O) C 2/m 2/m
- IV/G.11-10 Bariandite Al0.6V8O20·9(H2O) C 2/c 2/m
- IV/G.11-20 Bokite (Al,Fe)1.3(V,Fe)8O20·4.7(H2O) C 2/m 2/m
- IV/G.11-30 Straczekite (Ca,K,Ba)2V8O20·3(H2O) C 2/m 2/m
- IV/G.11-35 Fernandinite CaV8O20·4(H2O) C 2/m 2/m
- IV/G.11-40 Corvusite (Na,Ca,K)V8O20·4(H2O) C 2/m 2/m
General Bariandite Information |
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 Chemical Formula: |
Al0.6V8O20·9(H2O) | ||
| Composition: |
Molecular Weight = 905.85 gm | ||
| Aluminum 1.79 % Al 3.38 % Al2O3 | |||
| Vanadium 44.99 % V 80.31 % V2O5 | |||
| Hydrogen 2.00 % H 17.90 % H2O | |||
| Oxygen 51.22 % O | |||
| ______ ______ | |||
| 100.00 % 101.59 % = TOTAL OXIDE | |||
| Empirical Formula: |
Al0.6V5+8O20·9(H2O) | ||
| Environment: |
U-V deposit in sandstone. | ||
| IMA Status: |
Approved IMA 1971 | ||
| Locality: |
Mounana, Gabon. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Pierre Bariand (1933-), French mineralogist. | ||
Search for Bariandite Images | |||
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Images:
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Bariandite Crystallography |
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| Axial Ratios: |
a:b:c =3.2231:1:8.0055 | ||
| Cell Dimensions: |
a = 11.7, b = 3.63, c = 29.06, Z = 2; beta = 101.5° V = 1,209.43 Den(Calc)= 2.49 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 14.2(1), 3.43(0.6), 3.48(0.6), | ||
Physical Properties of Bariandite |
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| Cleavage: |
[001] Perfect | ||
| Color: |
Blue black. | ||
| Density: |
2.7 | ||
| Diaphaniety: |
Subopaque | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Luster: |
Sub Metallic | ||
| Streak: |
black | ||
Optical Properties of Bariandite |
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| Gladstone-Dale: |
CI meas= 0.077 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.3414,KPDmeas= 0.3148,KC= 0.3409 |
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| Optical Data: |
Biaxial (?), a=1.85 | ||
| Pleochroism (x): |
gray brown. | ||
| Pleochroism (y): |
brown. | ||
| Pleochroism (z): |
brown. | ||
Calculated Properties of Bariandite |
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| Electron Density: |
relectron=2.43 gm/cc |
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| Fermion Index |
Fermion Index = 0.00137 Boson Index = 0.99863 |
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| Photoelectric: |
PEBariandite = 8.59 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bariandite is Not Radioactive |
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Bariandite Classification |
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| Dana Class: |
47.3.2.4 (47)Vanadium Oxysalts | ||
| (47.3)(Hydrated) | |||
| (47.3.2)Dana Group | |||
| Strunz Class: |
IV/G.11-10 IV - Oxides | ||
| IV/G - Vanadiumoxides (with V4+/5+) Layered vanadates. Typical Vanadiumbronzes | |||
| IV/G.11 - Bariandite - Corvusite-? series | |||
Other Bariandite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Bariandite : 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 Bariandite using: Visit our Advertisers for Bariandite : Translate Bariandite Mineral Data : Ask about Bariandite here : Print or Cut-and-Paste your Bariandite Specimen Label here :
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