Mineralogy Database

Nabiasite Mineral Data

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General Nabiasite Information

Help on Chemical  Formula: Chemical Formula: BaMn9[(V,As)O4]6(OH)2
Help on Composition: Composition: Molecular Weight = 1,372.20 gm
   Barium     10.01 %  Ba   11.17 % BaO
   Manganese  36.03 %  Mn   46.53 % MnO
   Vanadium   19.68 %  V    35.12 % V2O5
   Arsenic     3.82 %  As    5.86 % As2O5
   Hydrogen    0.15 %  H     1.31 % H2O
   Oxygen     30.32 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaMn2+9(VO4)5.3(AsO4)0.7(OH)2
Help on Environment: Environment: In veinlets cross-cutting manganese ores.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Pla de Labasse deposit near the hamlet of Nabias, Central Pyrenees, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 68186
  PDF 42-1337

Nabiasite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.845, Z = 4; V = 2,119.35 Den(Calc)= 4.30
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: 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),

Physical Properties of Nabiasite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark red.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: dark orangish yellow

Optical Properties of Nabiasite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2442,KC= 0.2393
Ncalc = 2.03
Help on Optical Data: Optical Data: Isotropic, n=2-2.1.

Calculated Properties of Nabiasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Nabiasite =4.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENabiasite = 59.43 barns/electron
U=PENabiasite x rElectron Density= 236.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nabiasite is Not Radioactive

Nabiasite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.06)Dana Group Nabiasite! BaMn9[(V,As)O4]6(OH)2 P a3 2/m 3
Help on  Strunz Class: Strunz Class: 08.BF.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1
08.BF.20 Nabiasite! BaMn9[(V,As)O4]6(OH)2 P a3 2/m 3

Other Nabiasite Information

Help on References: References: NAME( MinRec, Vol 31, No 4) PHYS. PROP.(MinRec, Vol 31, No 4) OPTIC PROP.(MinRec, Vol 31, No 4)
Help on See Also: 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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Dana No: Strunz No: 08.BF.20





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