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 % V2 O5
Hydrogen 4.46 % H 39.87 % H2 O
Sulfur 11.83 % S 29.53 % SO3
Oxygen 64.92 % O
______ ______
100.00 % 102.95 % = TOTAL OXIDE
Empirical Formula:
V5+ O(SO4 )•6(H2 O)
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:
Orthorhombic Space Group: Unk
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEStanleyite = 4.21 barns/electronU=PEStanleyite x r Electron 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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Print or Cut-and-Paste your Stanleyite Specimen Label here :
Stanleyite
(V++++O)SO4•6(H2O)
Dana No: 29.06.13.01 Strunz No: 07.DE.50
Locality:
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