Cuprospinel Mineral Data

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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Physical Properties of Cuprospinel

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

Optical Properties of Cuprospinel

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	∑ 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:

r_electron=4.92 gm/cc
note: r_Cuprospinel=5.19 gm/cc.

Fermion Index

Fermion Index = 0.01128
Boson Index = 0.98872

Photoelectric:

PE_Cuprospinel= 24.54 barns/electron
U=PE_Cuprospinel x r_electron= 120.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cuprospinel is Not Radioactive

Cuprospinel Classification

Dana Class:

7.2.2.6 (7)Multiple Oxides

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

(7.2.2)(Iron subgroup)

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

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

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

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

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

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

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

Strunz Class:

IV/B.02-50 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related), Ferrite-Spinels

IV/B.02 - Spinel group, Magnesioferrite - Franklinite series

IV/B.02-10 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

IV/B.02-20 Magnetite FeFe2O4 F d3m 4/m 3 2/m

IV/B.02-30 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

IV/B.02-40 Trevorite NiFe2O4 F d3m 4/m 3 2/m

IV/B.02-50 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

IV/B.02-60 Franklinite (Zn,Mn,Fe)(Fe,Mn)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 -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 :

Cuprospinel

(Cu,Mg)Fe+++2O4
Dana No: 7.2.2.6 Strunz No: IV/B.02-50
Locality:

Notes: