Cuprocopiapite Mineral Data

Cuprocopiapite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

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

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:

r_electron=2.27 gm/cc
note: r_{Cuprocopiapite}=2.23 gm/cc.

Fermion Index

Fermion Index = 0.00519
Boson Index = 0.99481

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cuprocopiapite is Not Radioactive

Cuprocopiapite Classification

Dana Class:

31.10.5.3 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.10)miscellaneous

(31.10.5)Copiapite Group

31.10.5.1 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1

31.10.5.2 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1

31.10.5.3 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1

31.10.5.4 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1

31.10.5.5 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1

31.10.5.6 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1

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

Strunz Class:

VI/D.10-60 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.10 - Copiapite group, Botryogen - Chaidamuite

VI/D.10-10 Botryogen MgFe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-20 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-30 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1

VI/D.10-40 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-50 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-60 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-70 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1

VI/D.10-80 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2·20(H2O) P1 1

VI/D.10-90 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-100 Guildite CuFe(SO4)2(OH)·4(H2O) P 2₁/m 2/m

VI/D.10-110 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)·4(H2O) P1 1

Other Cuprocopiapite Information

References:

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Cuprocopiapite

CuFe+++4(SO4)6(OH)2·20(H2O)
Dana No: 31.10.5.3 Strunz No: VI/D.10-60
Locality:

Notes: