Mcconnellite Mineral Data

Mcconnellite Mineral Data +

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General Mcconnellite Information

Chemical Formula:

CuCrO2

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

Empirical Formula:

CuCrO₂

IMA Status:

Approved IMA 1976

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 26676

PDF 39-247

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Mcconnellite Crystallography

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 ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.47(1), 1.646(0.45), 2.85(0.4),

Physical Properties of Mcconnellite

Color:

Dark red.

Density:

5.49

Diaphaniety:

Opaque

Hardness:

5.5 - Knife Blade

Luster:

Metallic

Optical Properties of Mcconnellite

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

Electron Density:

r_electron=5.14 gm/cc
note: r_Mcconnellite=5.50 gm/cc.

Fermion Index

Fermion Index = 0.03358
Boson Index = 0.96642

Photoelectric:

PE_Mcconnellite= 27.52 barns/electron
U=PE_Mcconnellite x r_electron= 141.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mcconnellite is Not Radioactive

Mcconnellite Classification

Dana Class:

7.1.1.2 (7)Multiple Oxides

(7.1)where A B X2 containing copper

(7.1.1)Dana Group

7.1.1.1 Delafossite CuFeO2 R 3m 3 2/m

7.1.1.2 Mcconnellite CuCrO2 R 3m 3 2/m

Strunz Class:

IV/A.05-40 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.05 - Periclase Group, Tenorite - Crednerite series

IV/A.05-10 Tenorite CuO C 2/c 2/m

IV/A.05-20 Paramelaconite Cu2Cu2O3 I 4₁/amd 4/m 2/m 2/m

IV/A.05-30 Delafossite CuFeO2 R 3m 3 2/m

IV/A.05-40 Mcconnellite CuCrO2 R 3m 3 2/m

IV/A.05-50 Crednerite CuMnO2 A2/m 2/m

Other Mcconnellite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Mcconnellite

CuCrO2
Dana No: 7.1.1.2 Strunz No: IV/A.05-40
Locality:

Notes: