Barnesite Mineral Data

General Barnesite Information

Chemical Formula:

Na2V6O16•3(H2O)

Composition:

Molecular Weight = 661.66 gm

Sodium 6.95 % Na 9.37 % Na₂O

Vanadium 46.19 % V 82.46 % V₂O₅

Hydrogen 0.91 % H 8.17 % H₂O

Oxygen 45.94 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂V⁵⁺₆O₁₆•3(H₂O)

Environment:

In small cavities and fractures and as interstitial filling in sandstone in the oxidized zone of a vanadiferous uranium deposit.

IMA Status:

Approved IMA 1963

Locality:

Cactus Rat mine group, Yellow Cat district, 24 km southeast of Thompson, Grand Co., Utah. Link to MinDat.org Location Data.

Name Origin:

Named for William H. Barnes (1903- ), National Research Council of Canada, Ottawa, Canada, authority on the crystallography of many vanadium minerals.

Name Pronunciation:

Barnesite + Pronunciation

Synonym:

ICSD 15751

PDF 16-601

Barnesite Image

Images:

Barnesite

Comments: Bright red, acicular crystals of barnesite on matrix.
Location: Cactus Rat claim, Thompson, Grand County, Utah, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Barnesite Crystallography

Axial Ratios:

a:b:c =3.3786:1:2.1599

Cell Dimensions:

a = 12.17, b = 3.602, c = 7.78, Z = 1; beta = 95.03° V = 339.73 Den(Calc)= 3.23

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m

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

By Intensity(I/I_o): 7.9(1), 3.12(0.7), 3.45(0.35),

Physical Properties of Barnesite

Color:

Brown red, Dark red.

Density:

3.15

Luster:

Adamantine

Streak:

brownish red

Optical Properties of Barnesite

Gladstone-Dale:

CI meas= 0.224 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.243 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2467,KPDmeas= 0.253,KC= 0.3259
Ncalc = 2.03 - 2.05

Optical Data:

Biaxial (-), a=1.797

Calculated Properties of Barnesite

Electron Density:

Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Barnesite =3.15 gm/cc.

Fermion Index:

Fermion Index = 0.0013767458
Boson Index = 0.9986232542

Photoelectric:

PE_Barnesite= 8.97 barns/electron
U=PE_Barnesite x rElectron Density= 27.17 barns/cc.

Radioactivity:

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

Barnesite Classification

Dana Class:

47.03.01.03 (47)Vanadium Oxysalts

(47.03)(Hydrated)

(47.03.01)Hewettite Group

47.03.01.01 Hewettite CaV6O16•9(H2O) P 2/m 2/m

47.03.01.02 Metahewettite CaV6O16•3(H2O) A2/m 2/m

47.03.01.03 Barnesite Na2V6O16•3(H2O) P 2/m 2/m

47.03.01.04 Hendersonite Ca1.3V6O16•6(H2O) Pnam 2/m 2/m 2/m

47.03.01.05 Grantsite Na4CaxV2xV12-2xO32•8(H2O) C 2/m 2/m

Strunz Class:

04.HG.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HG -Unclassified V oxides

04.HG.45 Barnesite Na2V6O16•3(H2O) P 2/m 2/m

Other Barnesite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Barnesite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Barnesite Specimen Label here :

Barnesite

Na2V6O16•3(H2O)
Dana No: 47.03.01.03 Strunz No: 04.HG.45
Locality:

Notes:

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