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Stanleyite Mineral Data

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General Stanleyite Information

Help on Chemical  Formula: Chemical Formula: (V++++O)SO4•6(H2O)
Help on Composition: Composition: Molecular Weight = 271.10 gm
   Vanadium  18.79 %  V    33.55 % V2O5
   Hydrogen   4.46 %  H    39.87 % H2O
   Sulfur    11.83 %  S    29.53 % SO3
   Oxygen    64.92 %  O
            ______        ______ 
            100.00 %      102.95 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: V5+O(SO4)•6(H2O)
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Minasragra, Peru. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henry Morton Stanley (1841-1904), British journalist and explorer ("Dr. Livinston I presume?")
Help on Name Pronunciation: Name Pronunciation: Stanleyite + Pronunciation Say STANLEYITE

Stanleyite Image

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  Stanleyite   Patronite

Comments: Blue crystalline stanleyite on dark patronite.
Location: Minas Ragra, Junin, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stanleyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2481:1:1.5365
Help on Cell Dimensions: Cell Dimensions: a = 12.12, b = 9.71, c = 14.92, Z = 8; V = 1,755.86 Den(Calc)= 2.05
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.2(1), 4.98(0.9), 4.69(0.8),

Physical Properties of Stanleyite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue, Deep blue.
Help on Density: Density: 1.95
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Streak: Streak: white

Optical Properties of Stanleyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.118 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.161 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2532,KPDmeas= 0.2662,KC= 0.3019
Ncalc = 1.59 - 1.62
Help on Optical Data: Optical Data: Biaxial (+), a=1.505, b=1.519, g=1.533, bire=0.0280, 2V(Calc)=88, 2V(Meas)=large.

Calculated Properties of Stanleyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.00 gm/cc
note: Specific Gravity of Stanleyite =1.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0016751984
Boson Index = 0.9983248016
Help on Photoelectric: Photoelectric: PEStanleyite = 4.21 barns/electron
U=PEStanleyite x rElectron Density= 8.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stanleyite is Not Radioactive

Stanleyite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.06)where A XO4 � x(H2O)
  (29.06.13)Minasragrite Group (Orthorhombic) Stanleyite (VO)SO4•6(H2O) Unk Ortho Orthominasragrite! VO(SO4)•5(H2O) P mn21 mm2
Help on  Strunz Class: Strunz Class: 07.DE.50 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DE -With only medium-sized cations; unclassified
07.DE.50 Stanleyite (VO)SO4•6(H2O) Unk Ortho

Other Stanleyite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Stanleyite :
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: 07.DE.50





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