Stoiberite Mineral Data

General Stoiberite Information

Chemical Formula:

Cu5V+++++2O10

Composition:

Molecular Weight = 579.61 gm

Vanadium 17.58 % V 31.38 % V₂O₅

Copper 54.82 % Cu 68.62 % CuO

Oxygen 27.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₅V⁵⁺₂O₁₀

Environment:

Rare mineral, deposited in vanadium-bearing sublimates in fumaroles on a basaltic volcanic cone.

IMA Status:

Approved IMA 1979

Locality:

Izalco volcano, El Salvador. Link to MinDat.org Location Data.

Name Origin:

Named for Richard Edwin Stoiber (1911-2001), Emeritus Professor of Geology and Vulcanology, Dartmouth College, Hanover, New Hampshire, USA.

Name Pronunciation:

Stoiberite + Pronunciation

Synonym:

ICSD 2557

PDF 33-504

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Stoiberite Crystallography

Axial Ratios:

a:b:c =2.5857:1:1.385

Cell Dimensions:

a = 15.654, b = 6.054, c = 8.385, Z = 4; beta = 102.29° V = 776.43 Den(Calc)= 4.96

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.92(1), 2.095(0.8), 2.755(0.8),

Crystal Structure:

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Shannon R D , Calvo C , Acta Crystallographica, Section B , 29 (1973) p.1338-1345, Crystal structure of Cu5V2O10, Locality: synthetic

Physical Properties of Stoiberite

Color:

Black, Reddish brown.

Density:

4.96

Diaphaneity:

Opaque

Luster:

Metallic

Streak:

red brown

Optical Properties of Stoiberite

Optical Data:

NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.2233) where Ncalc=Dcalc*KC+1
NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.2233) where Ncalc=Dmeas*KC+1

Calculated Properties of Stoiberite

Electron Density:

Bulk Density (Electron Density)=4.64 gm/cc
note: Specific Gravity of Stoiberite =4.96 gm/cc.

Fermion Index:

Fermion Index = 0.0005719472
Boson Index = 0.9994280528

Photoelectric:

PE_Stoiberite= 28.12 barns/electron
U=PE_Stoiberite x rElectron Density= 130.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stoiberite is Not Radioactive

Stoiberite Classification

Dana Class:

41.04.05.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.04)where (A B)5 (XO4)2 Zq

(41.04.05)Dana Group

41.04.05.01 Stoiberite Cu5V2O10 P 2₁/n 2/m

41.04.05.02 Averievite! Cu5(VO4)2O2•CuCl2 P 3 3

Strunz Class:

08.BB.75 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1

08.BB.75 Stoiberite Cu5V2O10 P 2₁/n 2/m

Other Stoiberite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stoiberite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Stoiberite Specimen Label here :

Stoiberite

Cu5V+++++2O10
Dana No: 41.04.05.01 Strunz No: 08.BB.75
Locality:

Notes: