Cuprospinel Mineral Data

General Cuprospinel Information

Chemical Formula:

(Cu,Mg)Fe+++2O4

Composition:

Molecular Weight = 228.86 gm

Magnesium 1.06 % Mg 1.76 % MgO

Aluminum 1.18 % Al 2.23 % Al₂O₃

Iron 47.58 % Fe 1.57 % FeO / 66.29 % Fe₂O₃

Copper 22.21 % Cu 25.01 % Cu₂O

Oxygen 27.96 % O

______ ______

100.00 % 96.85 % = TOTAL OXIDE

Empirical Formula:

Cu_0.8Mg_0.1Fe²⁺_0.05Fe³⁺_1.9Al_0.1O₄

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

IMA1971-020

PDF 25-283

Cuprospinel Image

Images:

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

Cuprospinel Crystallography

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

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

By Intensity(I/I_o): 2.517(1), 1.479(0.6), 2.96(0.5),

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Forms: ( 1 1 1)

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Crystal Structure:

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Prince E , Treuting R G , Acta Crystallographica , 9 (1956) p.1025-1028, The structure of tetragonal copper ferrite, Locality: synthetic, Note: cell extrapolated from tetrahedra description

Physical Properties of Cuprospinel

Cleavage:

None

Color:

Black.

Density:

5 - 5.2, Average = 5.09

Diaphaneity:

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

Optical Properties of Cuprospinel

Optical Data:

NCalc= 2.44 - from Gladstone-Dale relationship (KC = 0.2784) where Ncalc=Dcalc*KC+1
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.2784) where Ncalc=Dmeas*KC+1

RL Color:

Gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cuprospinel in Air**
λ	R	∑ R(λ)
470 nm	22.70
546 nm	21.70
589 nm	21.00
650 nm	20.00

**Calculated Relative Intensity Colors of Cuprospinel in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	430%
R

Calculated Properties of Cuprospinel

Electron Density:

Bulk Density (Electron Density)=4.92 gm/cc
note: Specific Gravity of Cuprospinel =5.19 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Cuprospinel= 24.54 barns/electron
U=PE_Cuprospinel x rElectron Density= 120.65 barns/cc.

Radioactivity:

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

Cuprospinel Classification

Dana Class:

07.02.02.06 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.02)(Iron subgroup)

07.02.02.01 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

07.02.02.02 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

07.02.02.03 Magnetite FeFe2O4 F d3m 4/m 3 2/m

07.02.02.04 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m

07.02.02.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m

07.02.02.06 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

07.02.02.07 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m

Strunz Class:

04.BB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.B - Metal:Oxygen = 3:4 and similar

04.BB -With only medium-sized cations

04.BB.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m

04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m

04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m

04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m

04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m

04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m

04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m

04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m

04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m

04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m

04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m

04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m

Other Cuprospinel Information

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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

Cuprospinel

(Cu,Mg)Fe+++2O4
Dana No: 07.02.02.06 Strunz No: 04.BB.05
Locality:

Notes: