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Mcconnellite Mineral Data
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General Mcconnellite Information
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 Chemical Formula: |
CuCrO2 |
| Composition: |
Molecular Weight = 147.54 gm |
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Chromium 35.24 % Cr 51.51 % Cr2O3 |
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Copper 43.07 % Cu 48.49 % Cu2O |
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Oxygen 21.69 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CuCrO2 |
| Environment: |
Alluvial pebbles intergrown with other chromium oxides. |
| IMA Status: |
Approved IMA 1976 |
| Locality: |
Merume River, Mazaruni district, Guyana. Link to MinDat.org Location Data. |
| Name Origin: |
Named for R. B. McConnell (1903-1986), British geologist. |
| Name Pronunciation: |
Mcconnellite + Pronunciation  |
| Synonym: |
ICSD 26676 |
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PDF 39-247 |
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Mcconnellite Crystallography
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| Axial Ratios: |
a:c = 1:5.73506 |
| Cell Dimensions: |
a = 2.997, c = 17.188, Z = 3; V = 133.70 Den(Calc)= 5.50 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.47(1), 1.646(0.45), 2.85(0.4), |
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Physical Properties of Mcconnellite
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| Color: |
Dark red. |
| Density: |
5.49 |
| Diaphaneity: |
Opaque |
| Hardness: |
5.5 - Knife Blade |
| Luster: |
Metallic |
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Optical Properties of Mcconnellite
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| 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
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Calculated Properties of Mcconnellite
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| Electron Density: |
Bulk Density (Electron Density)=5.14 gm/cc
note: Specific Gravity of Mcconnellite =5.50 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEMcconnellite = 27.52 barns/electron
U=PEMcconnellite x rElectron Density= 141.58 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mcconnellite is Not Radioactive |
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Mcconnellite Classification
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| Dana Class: |
07.01.01.02 (07)Multiple Oxides |
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(07.01)where A B X2 containing copper |
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(07.01.01)Dana Group |
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07.01.01.01 Delafossite CuFeO2 R 3m 3 2/m |
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07.01.01.02 Mcconnellite CuCrO2 R 3m 3 2/m |
| Strunz Class: |
04.AB.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.A - Metal:Oxygen = 2.1 and 1:1 |
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04.AB -M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only |
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04.AB.15 Delafossite CuFeO2 R 3m 3 2/m |
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04.AB.15 Mcconnellite CuCrO2 R 3m 3 2/m |
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Other Mcconnellite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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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Print or Cut-and-Paste your Mcconnellite Specimen Label here :
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Mcconnellite
CuCrO2
Dana No: 07.01.01.02 Strunz No: 04.AB.15
Locality:
Notes:
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