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About BarnesiteHide

(Na,Ca)V6O16 · 3H2O
Brilliant dark red; brownish red on exposure
Specific Gravity:
3.09 - 3.15
Crystal System:
Member of:
Named in honor of William Howard Barnes (1903-1980), Canadian physicist and crystallographer, McGill University, Montreal (1924-1946), Head of X-ray Diffraction Section, Division of Physics, National Research Council of Canada, Ottawa (1947-1968), a major contributor to the knowledge of the crystal chemistry and crystal structures of vanadium minerals.
For obituary see
This page provides mineralogical data about Barnesite.

Classification of BarnesiteHide


4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides

3 : Hydrated Normal Vanadium Oxysalts

21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu

Pronounciation of BarnesiteHide

PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of BarnesiteHide

Brilliant dark red; brownish red on exposure
on {001}, fair on {100} and {010}
3.09 - 3.15 g/cm3 (Measured)    3.23 g/cm3 (Calculated)

Optical Data of BarnesiteHide

Biaxial (-)
RI values:
nα = 1.797 - 1.800 nβ = 2.010 - 2.040 nγ = 2.040 - 2.080
Measured: 60°
Max Birefringence:
δ = 0.243 - 0.280
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r << v
X = yellow, Y = yellow-orange, Z = red; Orientation: Y = a, Z = b, X vs. c = 5°

Chemical Properties of BarnesiteHide

(Na,Ca)V6O16 · 3H2O
IMA Formula:
Na2V5+6O16 · 3H2O
Common Impurities:

Crystallography of BarnesiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 12.17 Å, b = 3.602 Å, c = 7.78 Å
β = 95.03°
a:b:c = 3.379 : 1 : 2.16
Unit Cell V:
339.73 ų (Calculated from Unit Cell)
Subparallel to radiating aggregates of bladed to fibrous crystals, elongated along [010], to 0.5 mm; also as botryoidal to velvety coatings.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018488BarnesiteBachmann H G, Barnes W H (1962) The crystal structure of a sodium-calcium variety of metahewettite The Canadian Mineralogist 7 219-2351962Paradox Valley, Montrose County, Coldrado,USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
12.2 Å(25)
7.90 Å(100)
3.45 Å(35)
3.12 Å(70)
2.92 Å(18)
2.27 Å(25)
1.800 Å(25)
Recorded on type material

Type Occurrence of BarnesiteHide

Geological Setting of Type Material:
In small cavities and fractures and as interstitial filling in sandstone in the oxidized zone of a vanadiferous uranium deposit
Associated Minerals at Type Locality:

Other Language Names for BarnesiteHide


Relationship of Barnesite to other SpeciesHide

Member of:
Other Members of this group:
Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2OMon. 2/m : P21/m
Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
MetahewettiteCaV6O16 · 3H2OMon. 2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Barnesite associated with SteigeriteAl(VO4) · 3H2O
1 photo of Barnesite associated with Unnamed (Ni Vanadate)Ni3(VO4)2

Related Minerals - Nickel-Strunz GroupingHide

4.HG.CalciodelrioiteCa(VO3)2 · 4H2O Mon. 2/m : B2/b
4.HG.05FervaniteFe3+4V5+4O16 · 5H2OMon.
4.HG.10HuemuliteNa4Mg(V10O28) · 24H2OTric.
4.HG.15VanaliteNaAl8V10O38 · 30H2OMon.
4.HG.20SimplotiteCaV4+4O9 · 5H2OMon.
4.HG.25VanoxiteV4+4V5+2O13 · 8H2O
4.HG.30NavajoiteFe3+V5+9O24 · 12H2OMon. 2/m : B2/m
4.HG.35DelrioiteCaSr(V2O6)(OH)2 · 3H2OMon.
4.HG.50Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
4.HG.55Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2OMon. 2/m : P21/m
4.HG.60LenobliteV4+2O4 · 2H2OOrth. 2 2 2 : P21 21 21
4.HG.65SatpaeviteAl12V4+2V5+6O37 · 30H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide · 9H2OMon. 2/m : P21/m · 3H2OMon. 2/m,Sr)1.3V6O16 · 6H2OOrth.,Ca)2+x(V5+,V4+)6O16 · 4H2OMon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.1.2MuniriteNaVO3 · 1.9H2OMon.
21.1.4Bannermanite(Na,K)0.7V4+0.7V5+5.3O15Mon. 2/m : B2/m
21.1.5HowardevansiteNaCuFe2(VO4)3Tric. 1 : P1
21.1.6HuemuliteNa4Mg(V10O28) · 24H2OTric.
21.1.7Blossiteα-Cu2(V2O7)Orth. mm2 : Fdd2
21.1.10McbirneyiteCu3(VO4)2Tric. 1 : P1
21.1.11FingeriteCu11(VO4)6O2Tric. 1 : P1
21.1.12VolborthiteCu3(V2O7)(OH)2 · 2H2OMon. 2/m : B2/m
21.1.13TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
21.1.14VésigniéiteBaCu3(VO4)2(OH)2Mon. 2/m : B2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for BarnesiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Weeks, A. D., Ross, D. R. and Marvin, R. F. (1963): The occurrence and properties of barnesite, Na2V6O16.3H2O, a new hydrated sodium vanadate mineral from Utah. American Mineralogist 48, 1187-1195.
Evans, H. T., Jr. and Hughes, J. M. (1990): Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521, esp. 514-515.
Akinovich, E. A. and Podlipaeva, N. I. (1986): A Ca-variety of barnesite from rocks of a carbonaceous-siliceous vanadium-bearing formation in southern Kazakhstan. Zap. Vses. Mineral. Obshch. 115, 345-351.
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43

Internet Links for BarnesiteHide

Localities for BarnesiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion slag localities
          • Agios Konstantinos (Kamariza)
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (II). Mineralien-Welt 25 (2), 82-95 (in German).; Koshlyakova, N.N., Zubkova, N.V., Pekov, I.V., Giester, G., Pushcharovsky, D.Yu., Chukanov, N.V., Voudouris, P., Magganas, A., Katerinopoulos, A. (2016): Crystal chemistry of a Ni-Mg-analogue of lyonsite from slags of Lavrion, Greece. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry 193, 113-120.
  • Liguria
    • Genoa
      • Ne
Bittarello, E., Armellino, G., Ambrino, P., Ciriotti, M.E. (2013): Barnesite: primo ritrovamento europeo. Micro, 11, 98-105.
  • Kyzylorda Region
    • Shieli
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43
  • Turkistan Region
    • Aksumbe
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43
  • Colorado
    • Mesa Co.
      • Uravan Mining District
Minerals of Colorado (1997) Eckel, E. B.
    • Montrose Co.
      • Uravan Mining District
        • Bull Canyon
Eckel, E.B. (1997) Minerals of Colorado.
Minerals of Colorado (1997) Eckel, E. B.
        • Paradox Valley
Minerals of Colorado (1997) Eckel, E. B.
Minerals of Colorado (1997) Eckel, E. B.
    • San Miguel Co.
      • Slick Rock Mining District
Kampf, A. R., Plášil, J., Nash, B. P., & Marty, J. (2019). Ammoniomathesiusite, a new uranyl sulfate–vanadate mineral from the Burro mine, San Miguel County, Colorado, USA. Mineralogical Magazine, 83(1), 115-121.
  • Nevada
    • Eureka Co.
      • Gibellini Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43
  • New Mexico
    • Cibola Co.
Northrup, Minerals of New Mexico, 3rd Rev. Ed., 1996
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
  • Utah
    • Grand Co.
      • Thompsons Mining District
        • The Poison Strip
WEEKS, A.D., ROSS, D.R. & MARVIN, R.F. (1963): The occurrence and properties of barnesite, Na2V6O163H2O, a new hydrated sodium vanadate mineral from Utah. American Mineralogist 48, 1187-1195. EVANS, H.T. & HUGHES, J.M. (1990): Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521.
    • San Juan Co.
      • La Sal Mountains
        • La Sal Mining District (Paradox Valley Mining District)
          • La Sal
collection Leon Hupperichs
Mineral and/or Locality  
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