Stanleyite Mineral Data

General Stanleyite Information

Chemical Formula: (V++++O)SO4•6(H2O) 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 Empirical Formula: V⁵⁺O(SO₄)•6(H₂O) IMA Status: Approved IMA 1982 Locality: Minasragra, Peru. Link to MinDat.org Location Data. Name Origin: Named for Henry Morton Stanley (1841-1904), British journalist and explorer ("Dr. Livinston I presume?") Name Pronunciation: Stanleyite + Pronunciation  

Stanleyite Image

Images:

Stanleyite Crystallography

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

Physical Properties of Stanleyite

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

Optical Properties of Stanleyite

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 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

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

Stanleyite Classification

Dana Class: 29.06.13.01 (29)Hydrated Acid and Sulfates   (29.06)where A XO4 · x(H2O)   (29.06.13)Minasragrite Group (Orthorhombic)  

29.06.13.01 Stanleyite (VO)SO4•6(H2O) Unk Ortho

 

29.06.13.02 Orthominasragrite! VO(SO4)•5(H2O) P mn2₁ mm2

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

References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) 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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