Mineralogy Database

Mcconnellite Mineral Data

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General Mcconnellite Information

Help on Chemical  Formula: Chemical Formula: CuCrO2
Help on Composition: Composition: Molecular Weight = 147.54 gm
   Chromium  35.24 %  Cr   51.51 % Cr2O3
   Copper    43.07 %  Cu   48.49 % Cu2O
   Oxygen    21.69 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuCrO2
Help on Environment: Environment: Alluvial pebbles intergrown with other chromium oxides.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Merume River, Mazaruni district, Guyana. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for R. B. McConnell (1903-1986), British geologist.
Help on Name Pronunciation: Name Pronunciation: Mcconnellite + Pronunciation Say MCCONNELLITE
Help on Synonym: Synonym: ICSD 26676
  PDF 39-247

Mcconnellite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.73506
Help on Cell Dimensions: Cell Dimensions: a = 2.997, c = 17.188, Z = 3; V = 133.70 Den(Calc)= 5.50
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.47(1), 1.646(0.45), 2.85(0.4),

Physical Properties of Mcconnellite

Help on Color: Color: Dark red.
Help on Density: Density: 5.49
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Metallic

Optical Properties of Mcconnellite

Help on Optical Data: Optical Data: NCalc= 2.45 - from Gladstone-Dale relationship (KC = 0.2628) where Ncalc=Dcalc*KC+1
NCalc= 2.44 - from Gladstone-Dale relationship (KC = 0.2628) where Ncalc=Dmeas*KC+1

Calculated Properties of Mcconnellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.14 gm/cc
note: Specific Gravity of Mcconnellite =5.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEMcconnellite = 27.52 barns/electron
U=PEMcconnellite x rElectron Density= 141.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mcconnellite is Not Radioactive

Mcconnellite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.01)where A B X2 containing copper
  (07.01.01)Dana Group Delafossite CuFeO2 R 3m 3 2/m Mcconnellite CuCrO2 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 04.AB.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.A - Metal:Oxygen = 2.1 and 1:1
  04.AB -M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only
04.AB.15 Delafossite CuFeO2 R 3m 3 2/m
04.AB.15 Mcconnellite CuCrO2 R 3m 3 2/m

Other Mcconnellite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Mcconnellite :
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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Dana No: Strunz No: 04.AB.15





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