General Cuprospinel Information
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Chemical Formula: |
(Cu,Mg)Fe+++2O4 |
Composition: |
Molecular Weight = 228.86 gm |
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Magnesium 1.06 % Mg 1.76 % MgO |
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Aluminum 1.18 % Al 2.23 % Al2O3 |
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Iron 47.58 % Fe 1.57 % FeO / 66.29 % Fe2O3 |
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Copper 22.21 % Cu 25.01 % Cu2O |
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Oxygen 27.96 % O |
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______ ______ |
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100.00 % 96.85 % = TOTAL OXIDE |
Empirical Formula: |
Cu0.8Mg0.1Fe2+0.05Fe3+1.9Al0.1O4 |
Environment: |
In highly oxidized material, once spontaneously ignited, in an ore dump. |
IMA Status: |
Approved IMA 1973 |
Locality: |
Consolidated Rambler Mines Limited, near Baie Verte, Newfoundland, Canada. Link to MinDat.org Location Data. |
Name Origin: |
Named for the copper content and the spinel structure. |
Synonym: |
ICSD 24872 |
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IMA1971-020 |
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PDF 25-283 |
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Cuprospinel Image |
Images:
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Cuprospinel
Comments: 2mm piece of from the type specimen matrix with disseminated, black cuprospinel.
Location: Consolidated Rambler mine, Baie Verte, Newfoundland, Canada.
Scale: Specimen size 2 mm.
© Tom Loomis / Dakota Matrix |
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Cuprospinel Crystallography
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Cell Dimensions: |
a = 8.369, Z = 8; V = 586.17 Den(Calc)= 5.19 |
Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: |
By Intensity(I/Io): 2.517(1), 1.479(0.6), 2.96(0.5), |
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Physical Properties of Cuprospinel
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Cleavage: |
None |
Color: |
Black. |
Density: |
5 - 5.2, Average = 5.09 |
Diaphaniety: |
Opaque |
Habit: |
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks. |
Hardness: |
6.5-7 - Pyrite-Quartz |
Luster: |
Metallic |
Streak: |
black |
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Optical Properties of Cuprospinel
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Optical Data: |
NCalc= 2.43 - from Gladstone-Dale relationship (KC = 0.2755) where Ncalc=Dcalc*KC+1
NCalc= 2.4 - from Gladstone-Dale relationship (KC = 0.2755) where Ncalc=Dmeas*KC+1 |
RL Color: |
Gray. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Cuprospinel in Air
| λ |
R |
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∑ R(λ) |
| 470 nm |
22.70 |
 |
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| 546 nm |
21.70 |
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| 589 nm |
21.00 |
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| 650 nm |
20.00 |
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Calculated Relative Intensity Colors of Cuprospinel in Air
Relative Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
430% |
| R |
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Calculated Properties of Cuprospinel
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Electron Density: |
relectron=4.92 gm/cc note: rCuprospinel =5.19 gm/cc. |
Fermion Index |
Fermion Index = 0.01128 Boson Index = 0.98872 |
Photoelectric: |
PECuprospinel = 24.54 barns/electron U=PECuprospinel x relectron= 120.65 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cuprospinel is Not Radioactive |
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Cuprospinel Classification
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Dana Class: |
7.2.2.6 (7)Multiple Oxides |
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(7.2)(A+ B++)2 X4 Spinel group |
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(7.2.2)(Iron subgroup) |
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7.2.2.1 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m |
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7.2.2.2 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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7.2.2.3 Magnetite FeFe2O4 F d3m 4/m 3 2/m |
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7.2.2.4 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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7.2.2.5 Trevorite NiFe2O4 F d3m 4/m 3 2/m |
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7.2.2.6 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m |
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7.2.2.7 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m |
Strunz Class: |
IV/B.02-50 IV - Oxides |
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IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related), Ferrite-Spinels |
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IV/B.02 - Spinel group, Magnesioferrite - Franklinite series |
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IV/B.02-10 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m |
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IV/B.02-20 Magnetite FeFe2O4 F d3m 4/m 3 2/m |
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IV/B.02-30 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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IV/B.02-40 Trevorite NiFe2O4 F d3m 4/m 3 2/m |
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IV/B.02-50 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m |
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IV/B.02-60 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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Other Cuprospinel Information
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References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
See Also: |
Links to other databases for Cuprospinel :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 -Google Images
4 -Google Scholar
5 -Handbook of Mineralogy (UofA)
6 -MinDAT
7 -MinMax(Deutsch)
8 -MinMax(English)
9 -Mineralienatlas (Deutsch)
10 -QUT Mineral Atlas
11 - WWW-MINCRYST
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Print or Cut-and-Paste your Cuprospinel Specimen Label here :
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Cuprospinel
(Cu,Mg)Fe+++2O4
Dana No: 7.2.2.6 Strunz No: IV/B.02-50
Locality:
Notes:
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