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Nabiasite Mineral Data
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General Nabiasite Information
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 Chemical Formula: |
BaMn9[(V,As)O4]6(OH)2 |
| Composition: |
Molecular Weight = 1,372.20 gm |
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Barium 10.01 % Ba 11.17 % BaO |
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Manganese 36.03 % Mn 46.53 % MnO |
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Vanadium 19.68 % V 35.12 % V2O5 |
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Arsenic 3.82 % As 5.86 % As2O5 |
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Hydrogen 0.15 % H 1.31 % H2O |
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Oxygen 30.32 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
BaMn2+9(VO4)5.3(AsO4)0.7(OH)2 |
| Environment: |
In veinlets cross-cutting manganese ores. |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Pla de Labasse deposit near the hamlet of Nabias, Central Pyrenees, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
ICSD 68186 |
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IMA1997-050 |
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PDF 42-1337 |
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Nabiasite Crystallography
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| Cell Dimensions: |
a = 12.845, Z = 4; V = 2,119.35 Den(Calc)= 4.30 |
| Crystal System: |
Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.134(1), 2.332(1), 3.01(1),1.51(1), 2.79(1), 2.608(1), 2.859(0.8), |
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Physical Properties of Nabiasite
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| Cleavage: |
None |
| Color: |
Dark red. |
| Diaphaneity: |
Transparent |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Hardness: |
4-4.5 - Between Fluorite and Apatite |
| Luster: |
Adamantine |
| Streak: |
dark orangish yellow |
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Optical Properties of Nabiasite
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| Gladstone-Dale: |
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2442,KC= 0.2393
Ncalc = 2.03 |
| Optical Data: |
Isotropic, n=2-2.1. |
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Calculated Properties of Nabiasite
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| Electron Density: |
Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Nabiasite =4.30 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PENabiasite = 59.43 barns/electron
U=PENabiasite x rElectron Density= 236.89 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nabiasite is Not Radioactive |
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Nabiasite Classification
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| Dana Class: |
38.02.06.01 (38)Anhydrous Phosphates, etc |
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(38.02)(A+ B++)5 (XO4)3 |
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(38.02.06)Dana Group |
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38.02.06.01 Nabiasite! BaMn9[(V,As)O4]6(OH)2 P a3 2/m 3 |
| Strunz Class: |
08.BF.20 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.B - Phosphates, etc. with Additional Anions, without H2O |
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08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1 |
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08.BF.20 Nabiasite! BaMn9[(V,As)O4]6(OH)2 P a3 2/m 3 |
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Other Nabiasite Information
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| References: |
NAME( MinRec, Vol 31, No 4) PHYS. PROP.(MinRec, Vol 31, No 4) OPTIC PROP.(MinRec, Vol 31, No 4) |
| See Also: |
Links to other databases for Nabiasite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Print or Cut-and-Paste your Nabiasite Specimen Label here :
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Nabiasite
BaMn9[(V,As)O4]6(OH)2
Dana No: 38.02.06.01 Strunz No: 08.BF.20
Locality:
Notes:
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