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 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

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

$Help on X Ray Diffraction:$ 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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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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