Mcbirneyite Mineral Data

General Mcbirneyite Information

Chemical Formula:

Cu3(VO4)2

Composition:

Molecular Weight = 420.52 gm

Vanadium 24.23 % V 43.25 % V₂O₅

Copper 45.33 % Cu 56.75 % CuO

Oxygen 30.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₃(VO₄)₂

Environment:

Sulfate zone of sublimates around a fumarole in a composite volcano, likely formed between 100 deg C-200 deg C.

IMA Status:

Approved IMA 1984

Locality:

Fumarole "Y", Izalco Volcano, El Salvador. Link to MinDat.org Location Data.

Name Origin:

Named for Alexander Robert McBirney (1924-), Volcanologist, University of Oregon, Corvallis, Oregon, USA.

Name Pronunciation:

Mcbirneyite + Pronunciation

Synonym:

ICSD 27184

PDF 44-1480

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Mcbirneyite Crystallography

Axial Ratios:

a:b:c =0.8205:1:0.7956

Cell Dimensions:

a = 5.3418, b = 6.51, c = 5.1798, Z = 1; alpha = 88.61°, beta = 68.11°, gamma = 69.22° V = 156.22 Den(Calc)= 4.47

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.82(1), 3.12(1), 4.01(0.8),

Crystal Structure:

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Coing-Boyat J , Acta Crystallographica, Section B , 38 (1982) p.1546-1548, Structure de la variete ordinaire, triclinique, de l orthovanadate de, cuivre(II), Cu3(VO4)2, Locality: synthetic

Physical Properties of Mcbirneyite

Color:

Dark gray, Black.

Diaphaneity:

Opaque

Luster:

Metallic

Streak:

grayish black

Optical Properties of Mcbirneyite

Optical Data:

NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.2435) where Ncalc=Dcalc*KC+1

Calculated Properties of Mcbirneyite

Electron Density:

Bulk Density (Electron Density)=4.22 gm/cc
note: Specific Gravity of Mcbirneyite =4.50 gm/cc.

Fermion Index:

Fermion Index = 0.0007518027
Boson Index = 0.9992481973

Photoelectric:

PE_Mcbirneyite= 25.11 barns/electron
U=PE_Mcbirneyite x rElectron Density= 105.88 barns/cc.

Radioactivity:

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

Mcbirneyite Classification

Dana Class:

38.03.10.01 (38)Anhydrous Phosphates, etc

(38.03)(A+ B++)3 (XO4)2

(38.03.10)Dana Group

38.03.10.01 Mcbirneyite Cu3(VO4)2 P1 1

Strunz Class:

08.AB.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AB -With medium-sized cations

08.AB.35 Stranskiite Zn2Cu(AsO4)2 P1 1

08.AB.35 Mcbirneyite Cu3(VO4)2 P1 1

Other Mcbirneyite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.73,p1495,1988)

See Also:

Links to other databases for Mcbirneyite :
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 Mcbirneyite Specimen Label here :

Mcbirneyite

Cu3(VO4)2
Dana No: 38.03.10.01 Strunz No: 08.AB.35
Locality:

Notes: