Mineralogy Database

Doloresite Mineral Data

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General Doloresite Information

Help on Chemical  Formula: Chemical Formula: H8V++++6O16
Help on Composition: Composition: Molecular Weight = 569.70 gm
   Vanadium  53.65 %  V    87.35 % VO2
   Hydrogen   1.42 %  H    12.65 % H2O
   Oxygen    44.93 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: H8V4+6O16
Help on Environment: Environment: In relatively unoxidized uraniium-vanadium ores; from the cores of black, concretionary masses high in U-V, surrounding tyuyamunite-bearing sandstone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: La Sal No. 2 mine, Lumsden Canyon, Gateway District, Dolores River, southwestern Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Doloresite + Pronunciation Say DOLORESITE
Help on Synonym: Synonym: ICSD 27541
  PDF 11-368

Doloresite Image

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Comments: black radiating doloresite and crystalline doloresite with white calcite.
Location: Grants, Valencia County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Doloresite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =6.5685:1:1.6153
Help on Cell Dimensions: Cell Dimensions: a = 19.64, b = 2.99, c = 4.83, Z = 1; beta = 103.9° V = 275.33 Den(Calc)= 3.44
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.7(1), 2.45(0.5), 3.83(0.5),

Physical Properties of Doloresite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Dark brown, Black.
Help on Density: Density: 3.27 - 3.33, Average = 3.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Fibrous - Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos).
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: greenish black

Optical Properties of Doloresite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.294 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.323 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2616,KPDmeas= 0.2727,KC= 0.3863
Ncalc = 2.26 - 2.33
Help on Optical Data: Optical Data: Biaxial (?), b=1.9
Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: Gray with color variation along crystals.

Calculated Properties of Doloresite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Doloresite =3.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015590712
Boson Index = 0.9984409288
Help on Photoelectric: Photoelectric: PEDoloresite = 10.26 barns/electron
U=PEDoloresite x rElectron Density= 32.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Doloresite is Not Radioactive

Doloresite Classification

Help on  Dana Class: Dana Class: (47)Vanadium Oxysalts
  (47.04)(Hydrated Containing V++++ and V+++++)
  (47.04.07)Dana Group Doloresite H8V6O16 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.HE.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HE -Phyllovanadates
04.HE.30 Doloresite H8V6O16 C 2/m 2/m

Other Doloresite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Doloresite :
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.HE.30





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