Cuprocopiapite Mineral Data

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General Cuprocopiapite Information

Chemical Formula:

CuFe+++4(SO4)6(OH)2•20(H2O)

Composition:

Molecular Weight = 1,257.64 gm

Iron 17.76 % Fe 25.40 % Fe₂O₃

Copper 5.05 % Cu 6.32 % CuO

Hydrogen 3.37 % H 30.08 % H₂O

Sulfur 15.30 % S 38.20 % SO₃

Oxygen 58.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuFe³⁺₄(SO₄)₆(OH)₂•20(H₂O)

Environment:

Secondary mineral probably formed by reaction between copiapite and copper sulfate-bearing solutions, preserved in arid climates.

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Chuquicamata and at Quetena, west of Calama, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named as the cuprian member of the copiapite group.

Cuprocopiapite Image

Images:

Cuprocopiapite

Comments: Grayish green crusts of cuprocopiapite on gypsum.
Location: Copper Queen Mine, Double Mountain Fork of Brazois River, Stonewall County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuprocopiapite Crystallography

Axial Ratios:

a:b:c =0.4035:1:0.4002

Cell Dimensions:

a = 7.34, b = 18.19, c = 7.28, Z = 1; alpha = 93.85°, beta = 101.5°, gamma = 99.33° V = 937.75 Den(Calc)= 2.23

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.56(1), 8.81(0.8), 5.82(0.5),

Physical Properties of Cuprocopiapite

Cleavage:

{010} Perfect

Color:

Greenish yellow, Yellow, Orange.

Density:

2.08 - 2.17, Average = 2.12

Diaphaneity:

Transparent to Translucent

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Pearly

Streak:

light yellow

Optical Properties of Cuprocopiapite

Gladstone-Dale:

CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.262,KPDmeas= 0.275,KC= 0.2606
Ncalc = 1.54 - 1.58

Optical Data:

Biaxial (+), a=1.558, b=1.575, g=1.62, bire=0.0620, 2V(Calc)=66, 2V(Meas)=63.

Calculated Properties of Cuprocopiapite

Electron Density:

Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Cuprocopiapite =2.23 gm/cc.

Fermion Index:

Fermion Index = 0.0051989709
Boson Index = 0.9948010291

Photoelectric:

PE_{Cuprocopiapite}= 8.21 barns/electron
U=PE_{Cuprocopiapite} x rElectron Density= 18.60 barns/cc.

Radioactivity:

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

Cuprocopiapite Classification

Dana Class:

31.10.05.03 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.10)miscellaneous

(31.10.05)Copiapite Group

31.10.05.01 Copiapite FeFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.02 Magnesiocopiapite MgFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.03 Cuprocopiapite CuFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.04 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.05 Calciocopiapite CaFe4(SO4)6(OH)2•19(H2O) P1 1

31.10.05.06 Zincocopiapite ZnFe4(SO4)6(OH)2•18(H2O) P1 1

31.10.05.07 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2•20(H2O) P1 1

Strunz Class:

07.DB.35 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DB -With only medium-sized cations; insular octahedra and finite groups

07.DB.35 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2•20(H2O) P1 1

07.DB.35 Copiapite FeFe4(SO4)6(OH)2•20(H2O) P1 1

07.DB.35 Calciocopiapite CaFe4(SO4)6(OH)2•19(H2O) P1 1

07.DB.35 Cuprocopiapite CuFe4(SO4)6(OH)2•20(H2O) P1 1

07.DB.35 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2•20(H2O) P1 1

07.DB.35 Magnesiocopiapite MgFe4(SO4)6(OH)2•20(H2O) P1 1

07.DB.35 Zincocopiapite ZnFe4(SO4)6(OH)2•18(H2O) P1 1

Other Cuprocopiapite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Cuprocopiapite :
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 Cuprocopiapite Specimen Label here :

Cuprocopiapite

CuFe+++4(SO4)6(OH)2•20(H2O)
Dana No: 31.10.05.03 Strunz No: 07.DB.35
Locality:

Notes: