Barnesite
A valid IMA mineral species
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About Barnesite
Formula:
(Na,Ca)V6O16 · 3H2O
Colour:
Brilliant dark red; brownish red on exposure
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
3.09 - 3.15
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of William Howard Barnes (9 January 1903, Montreal, Quebec, Canada - 25 October 1980), physicist and crystallographer, McGill University, Montreal, Canada (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.
This page provides mineralogical data about Barnesite.
Unique Identifiers
Mindat ID:
533
Long-form identifier:
mindat:1:1:533:9
GUID
(UUID V4):
(UUID V4):
f9056f12-b9ea-4b43-b3d8-a35fd61ec7b1
IMA Classification of Barnesite
Approved
IMA Formula:
Na2V5+6O16 · 3H2O
First published:
1963
Classification of Barnesite
4.HG.45
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
47.3.1.3
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.1.3
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Bar | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Barnesite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Barnesite
Adamantine
Transparency:
Translucent
Colour:
Brilliant dark red; brownish red on exposure
Hardness:
3 on Mohs scale
Tenacity:
Fragile
Cleavage:
Perfect
on {001}, fair on {100} and {010}
on {001}, fair on {100} and {010}
Density:
3.09 - 3.15 g/cm3 (Measured) 3.23 g/cm3 (Calculated)
Optical Data of Barnesite
Type:
Biaxial (-)
RI values:
nα = 1.797 - 1.800 nβ = 2.010 - 2.040 nγ = 2.040 - 2.080
2V:
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.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r << v
Pleochroism:
Strong
Comments:
X = yellow, Y = yellow-orange, Z = red; Orientation: Y = a, Z = b, X vs. c = 5°
Chemistry of Barnesite
Mindat Formula:
(Na,Ca)V6O16 · 3H2O
Common Impurities:
Ca
Crystallography of Barnesite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/m
Cell Parameters:
a = 12.17 Å, b = 3.602 Å, c = 7.78 Å
β = 95.03°
β = 95.03°
Ratio:
a:b:c = 3.379 : 1 : 2.16
Unit Cell V:
339.73 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Subparallel to radiating aggregates of bladed to fibrous crystals, elongated along [010], to 0.5 mm; also as botryoidal to velvety coatings.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0018488 | Barnesite | Bachmann H G, Barnes W H (1962) The crystal structure of a sodium-calcium variety of metahewettite The Canadian Mineralogist 7 219-235 | 1962 | Paradox Valley, Montrose County, Coldrado,USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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) |
Comments:
Recorded on type material
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47e : [Vanadates, chromates, manganates] | |
47h : [Near-surface oxidized, dehydrated minerals] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Barnesite
General Appearance of Type Material:
Dark red microscopic bladed to fibrous crystals either in loose aggregates or in radiating clusters. In continuous coatings, it is velvety with a botryoidal appearance.
Place of Conservation of Type Material:
Not recorded
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:
Reference:
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.
Other Language Names for Barnesite
Relationship of Barnesite to other Species
Member of:
Other Members of this group:
Grantsite | (Na,Ca)2+x(V5+,V4+)6O16 · 4H2O | Mon. 2/m : P21/m |
Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O | Orth. |
Hewettite | CaV6O16 · 9H2O | Mon. 2/m : P21/m |
Metahewettite | CaV6O16 · 3H2O | Mon. 2/m |
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Barnesite associated with Steigerite | Al(VO4) · 3H2O |
1 photo of Barnesite associated with Unnamed (Ni Vanadate) | Ni3(VO4)2 |
1 photo of Barnesite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
1 photo of Barnesite associated with Sandstone | |
1 photo of Barnesite associated with Slag |
Related Minerals - Strunz-mindat Grouping
4.HG. | Calciodelrioite | Ca(VO3)2 · 4H2O |
4.HG. | Trebiskyite | Na3Mg2[TiV9O28] · 22H2O |
4.HG.05 | Fervanite | Fe3+4V5+4O16 · 5H2O |
4.HG.10 | Huemulite | Na4Mg(V10O28) · 24H2O |
4.HG.15 | Vanalite | NaAl8V10O38 · 30H2O |
4.HG.20 | Simplotite | CaV4+4O9 · 5H2O |
4.HG.25 | Vanoxite | V4+4V5+2O13 · 8H2O |
4.HG.30 | Navajoite | Fe3+V5+9O24 · 12H2O |
4.HG.35 | Delrioite | CaSr(V2O6)(OH)2 · 3H2O |
4.HG.40 | Metadelrioite | CaSr(V2O6)(OH)2 |
4.HG.50 | Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O |
4.HG.55 | Grantsite | (Na,Ca)2+x(V5+,V4+)6O16 · 4H2O |
4.HG.60 | Lenoblite | V4+2O4 · 2H2O |
4.HG.65 | Satpaevite | Al12V4+2V5+6O37 · 30H2O |
4.HG.70 | Pandoraite-Ba | BaV4+5V5+2O16 · 3H2O |
4.HG.70 | Pandoraite-Ca | CaV4+5V5+2O16 · 3H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Barnesite
mindat.org URL:
https://www.mindat.org/min-533.html
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References for Barnesite
Reference List:
Weeks, Alice D., Ross, Daphne R., Marvin, Richard F. (1963) The occurrence and properties of barnesite, Na2V6O16·3H2O, a new hydrated sodium vanadate mineral from Utah. American Mineralogist, 48 (11-12) 1187-1195
Localities for Barnesite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Greece | |
| Kolitsch et al. (2014) +1 other reference |
Italy | |
| Bittarello et al. (2013) |
Kazakhstan | |
| Anthony (1997) |
| Anthony (1997) |
USA | |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
Eckel et al. (1997) | |
| Eckel et al. (1997) |
Eckel et al. (1997) | |
| Kampf et al. (2019) |
| Castor et al. (2004) |
Anthony (1997) | |
| Northrop et al. (1996) |
Northrop et al. (1996) | |
| Weeks et al. (1963) +1 other reference |
| In the collection of Alex Earl |
| collection Leon Hupperichs |
| Joe Marty Collection |
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Burro Mine, Slick Rock Mining District, San Miguel County, Colorado, USA