Nabiasite Mineral Data

General Nabiasite Information

Chemical Formula:

BaMn9[(V,As)O4]6(OH)2

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

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

IMA1997-050

PDF 42-1337

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Nabiasite Crystallography

Cell Dimensions:

a = 12.845, Z = 4; V = 2,119.35 Den(Calc)= 4.30

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.134(1), 2.332(1), 3.01(1),1.51(1), 2.79(1), 2.608(1), 2.859(0.8),

Crystal Structure:

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Brugger J , Bonin M , Schenk K J , Meisser N , Berlepsch P , Ragu A , European Journal of Mineralogy , 11 (1999) p.879-890, Description and crystal structure of nabiasite, BaMn9[(V,As)O4]6(OH)2,, a new mineral from the Central Pyrenees (France), Locality: Central Pyrenees, France

Physical Properties of Nabiasite

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

Optical Properties of Nabiasite

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.

Calculated Properties of Nabiasite

Electron Density:

Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Nabiasite =4.30 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Nabiasite= 59.43 barns/electron
U=PE_Nabiasite x rElectron Density= 236.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nabiasite is Not Radioactive

Nabiasite Classification

Dana Class:

38.02.06.01 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.06)Dana Group

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

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

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 :

Nabiasite

BaMn9[(V,As)O4]6(OH)2
Dana No: 38.02.06.01 Strunz No: 08.BF.20
Locality:

Notes: