Mineralogy Database

Barnesite Mineral Data

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General Barnesite Information

Help on Chemical  Formula: Chemical Formula: Na2V6O16•3(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na2V5+6O16•3(H2O)
Help on Environment: Environment: In small cavities and fractures and as interstitial filling in sandstone in the oxidized zone of a vanadiferous uranium deposit.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Cactus Rat mine group, Yellow Cat district, 24 km southeast of Thompson, Grand Co., Utah. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William H. Barnes (1903- ), National Research Council of Canada, Ottawa, Canada, authority on the crystallography of many vanadium minerals.
Help on Name Pronunciation: Name Pronunciation: Barnesite + Pronunciation Say BARNESITE
Help on Synonym: Synonym: ICSD 15751
  PDF 16-601

Barnesite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =3.3786:1:2.1599
Help on Cell Dimensions: Cell Dimensions: a = 12.17, b = 3.602, c = 7.78, Z = 1; beta = 95.03° V = 339.73 Den(Calc)= 3.23
Help on Crystal System: 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/Io): 7.9(1), 3.12(0.7), 3.45(0.35),

Physical Properties of Barnesite

Help on Color: Color: Brown red, Dark red.
Help on Density: Density: 3.15
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brownish red

Optical Properties of Barnesite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Biaxial (-), a=1.797

Calculated Properties of Barnesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Barnesite =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013767458
Boson Index = 0.9986232542
Help on Photoelectric: Photoelectric: PEBarnesite = 8.97 barns/electron
U=PEBarnesite x rElectron Density= 27.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barnesite is Not Radioactive

Barnesite Classification

Help on  Dana Class: Dana Class: (47)Vanadium Oxysalts
  (47.03.01)Hewettite Group Hewettite CaV6O16•9(H2O) P 2/m 2/m Metahewettite CaV6O16•3(H2O) A2/m 2/m Barnesite Na2V6O16•3(H2O) P 2/m 2/m Hendersonite Ca1.3V6O16•6(H2O) Pnam 2/m 2/m 2/m Grantsite Na4CaxV2xV12-2xO32•8(H2O) C 2/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 04.HG.45





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