Doloresite
A valid IMA mineral species - grandfathered
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About Doloresite
Formula:
V4+3O4(OH)4
Colour:
Nearly black with dark bronzy tarnish. Very fine fragments under oil immersion are reddish brown to yellow red in transmitted light.
Lustre:
Sub-Metallic
Specific Gravity:
3.27 - 3.33
Crystal System:
Monoclinic
Name:
Named for the Dolores River, "a major stream of the Colorado Plateau" and near the type locality.
Often intimately intermixed with other vanadium oxide minerals, especially montroseite–paramontroseite.
Unique Identifiers
Mindat ID:
1305
Long-form identifier:
mindat:1:1:1305:1
GUID
(UUID V4):
(UUID V4):
e135fab9-38fd-4813-be13-c2c1d5366ad4
IMA Classification of Doloresite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1957
Classification of Doloresite
4.HE.30
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
47.4.7.1
47 : VANADIUM OXYSALTS
4 : Vanadium Bronzes
47 : VANADIUM OXYSALTS
4 : Vanadium Bronzes
7.12.6
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
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 |
---|---|---|
Dlr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Doloresite
Sub-Metallic
Transparency:
Translucent, Opaque
Colour:
Nearly black with dark bronzy tarnish. Very fine fragments under oil immersion are reddish brown to yellow red in transmitted light.
Streak:
Greenish black
Cleavage:
Distinct/Good
Flaky
Flaky
Fracture:
Fibrous
Density:
3.27 - 3.33 g/cm3 (Measured) 3.41 g/cm3 (Calculated)
Comment:
Measured with a Berman balance.
Optical Data of Doloresite
Type:
Biaxial
RI values:
n = 1.90
Max Birefringence:
δ = 0.000
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
Anisotropism:
Strong
Colour in reflected light:
Gray, variable along the elongation of the crystals, and shows selective absorption in plane polarized light
Chemistry of Doloresite
Mindat Formula:
V4+3O4(OH)4
Elements listed:
Crystallography of Doloresite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 19.64(6) Å, b = 2.99(1) Å, c = 4.83(2) Å
β = 103.91°
β = 103.91°
Ratio:
a:b:c = 6.569 : 1 : 1.615
Unit Cell V:
275.32 ų (Calculated from Unit Cell)
Z:
5
Twinning:
Lamellar submicroscopic twinning.
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) |
---|---|---|---|---|---|---|---|
0000095 | Doloresite | Evans H T, Mrose M E (1960) A crystal chemical study of the vanadium oxide minerals, haggite and doloresite American Mineralogist 45 1144-1166 | 1960 | 0 | 293 | ||
0009206 | Doloresite | Evans H T, Mrose M E (1958) The crystal structures of three new vanadium oxide minerals Acta Crystallographica 11 56-58 | 1958 | Carlile, Wyoming, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.70 Å | (100) |
3.83 Å | (50) |
3.16 Å | (42) |
2.98 Å | (15) |
2.45 Å | (50) |
1.933 Å | (25) |
1.799 Å | (21) |
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] |
Type Occurrence of Doloresite
Place of Conservation of Type Material:
No defined type material.
Geological Setting of Type Material:
Unoxidized vanadium-uranium ores in sandstone. Secondary replacement of primary montroseite.
Associated Minerals at Type Locality:
Reference:
Stern, T.W., L.R. Stieff, H.T. Evans, Jr., and A.M. Sherwood (1957) Doloresite, a new vanadium oxide mineral from the Colorado Plateau. Amererican Mineralogist: 42: 587–593.
Other Language Names for Doloresite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
4.HE.05 | Melanovanadite | Ca(V5+,V4+)4O10 · 5H2O |
4.HE.10 | Shcherbinaite | V5+2O5 |
4.HE.15 | Hewettite | CaV6O16 · 9H2O |
4.HE.15 | Metahewettite | CaV6O16 · 3H2O |
4.HE.20 | Bariandite | Al0.6(V5+,V4+)8O20 · 9H2O |
4.HE.20 | Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O |
4.HE.20 | Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
4.HE.20 | Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O |
4.HE.20 | Straczekite | (Ca,K,Ba)(V5+,V4+)8O20 · 3H2O |
4.HE.25 | Häggite | V3+V4+O2(OH)3 |
4.HE.35 | Duttonite | V4+O(OH)2 |
4.HE.40 | Cavoite | CaV4+3O7 |
Other Information
Notes:
Slowly soluble in 1:1 HCl, yielding a green solution. 1:1 HNO3 yields a blue solution. No reaction is observed with 1:1 NH4OH. Slightly soluble in 40% KOH. No reaction with either 20% KCN or 20% FeCl2.
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 Doloresite
mindat.org URL:
https://www.mindat.org/min-1305.html
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References for Doloresite
Reference List:
Localities for Doloresite
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.
Argentina | |
| de Brodtkorb (1982) |
Australia | |
| Schmid +2 other references |
| Muller (1972) +1 other reference |
Canada | |
| Bottrill +2 other references |
USA | |
| Weeks et al. (1955) +4 other references |
Stern (1957) +5 other references | |
| Am Min 45 (1960) +1 other reference |
| Eckel et al. (1997) |
Eckel et al. (1997) | |
Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Garrels et al. (1959) |
Eckel et al. (1997) | |
Eckel et al. (1997) | |
| Eckel et al. (1997) |
| Northrop et al. (1996) |
Northrop et al. (1996) | |
| Northrop et al. (1996) |
| NMBMMR Memoir 15 Geology and Technology ... |
| Färber (n.d.) |
Page et al. (1956) +2 other references | |
Bullock (1981) | |
| Bullock (1981) |
Bullock (1981) | |
Bullock (1981) | |
Page et al. (1956) +3 other references | |
Bullock (1981) | |
Bullock (1981) | |
Douglas L. Beahm and Andrew C. Anderson (2008) | |
| Am Min 45:1144-1166 |
| USGS Bull 1082J |
Uzbekistan | |
| Pavel.M. Kartashov (n.d.) |
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Firefly–Pigmay Mine, La Sal Creek Mining District, San Juan County, Utah, USA