Cuprocopiapite
A valid IMA mineral species - grandfathered
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About Cuprocopiapite
Formula:
Cu2+Fe3+4(SO4)6(OH)2 · 20H2O
Colour:
Yellow-orange, greenish-yellow
Lustre:
Pearly
Hardness:
2½ - 3
Specific Gravity:
2.23
Crystal System:
Triclinic
Member of:
Name:
In allusion to the composition as the copper dominant (CUPRO) member of the COPIAPITE group.
Unique Identifiers
Mindat ID:
1181
Long-form identifier:
mindat:1:1:1181:1
GUID
(UUID V4):
(UUID V4):
51799476-baf9-4a62-92db-c526cfb03acd
IMA Classification of Cuprocopiapite
Approved, 'Grandfathered' (first described prior to 1959)
Classification of Cuprocopiapite
7.DB.35
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
31.10.5.3
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cucpi | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cuprocopiapite
Pearly
Colour:
Yellow-orange, greenish-yellow
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Perfect
Perfect on {010}
Imperfect on {101}
Perfect on {010}
Imperfect on {101}
Density:
2.23 g/cm3 (Measured) 2.26 g/cm3 (Calculated)
Optical Data of Cuprocopiapite
Type:
Biaxial (+)
RI values:
nα = 1.558 nβ = 1.575 nγ = 1.620
2V:
Calculated: 63°
Max Birefringence:
δ = 0.062
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
Strong r > v
Pleochroism:
Strong
Comments:
Shades of green
Chemistry of Cuprocopiapite
Mindat Formula:
Cu2+Fe3+4(SO4)6(OH)2 · 20H2O
Crystallography of Cuprocopiapite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.34 Å, b = 18.19 Å, c = 7.28 Å
α = 93.88°, β = 101.5°, γ = 99.38°
α = 93.88°, β = 101.5°, γ = 99.38°
Ratio:
a:b:c = 0.404 : 1 : 0.4
Unit Cell V:
934.68 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Fine-grained lumpy aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.56 Å | (100) |
| 8.81 Å | (80) |
| 5.82 Å | (50) |
| 6.32 Å | (40) |
| 3.08 Å | (40) |
| 3.90 Å | (30) |
| 3.76 Å | (30) |
Comments:
Quetena, Chile. ICDD 19-394.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] |
Geological Setting:
Mineral is formed by the reaction of copper sulfate solutions and copiapite in arid environments.
Type Occurrence of Cuprocopiapite
Place of Conservation of Type Material:
Harvard University, Boston Ma, USA 99048, 99060
Other Language Names for Cuprocopiapite
Simplified Chinese:铜叶绿矾
Relationship of Cuprocopiapite to other Species
Member of:
Other Members of this group:
| Aluminocopiapite | Al2/3Fe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Calciocopiapite | CaFe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Copiapite | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Magnesiocopiapite | MgFe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Zincocopiapite | ZnFe3+4(SO4)6(OH)2 · 18H2O | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Cuprocopiapite associated with Chalcanthite | CuSO4 · 5H2O |
| 2 photos of Cuprocopiapite associated with Boothite | CuSO4 · 7H2O |
| 1 photo of Cuprocopiapite associated with Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| 1 photo of Cuprocopiapite associated with Sideronatrite | Na2Fe(SO4)2(OH) · 3H2O |
| 1 photo of Cuprocopiapite associated with Gypsum | CaSO4 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DB.05 | Aubertite | CuAl(SO4)2Cl · 14H2O |
| 7.DB.05 | Magnesioaubertite | (Mg,Cu)Al(SO4)2Cl · 14H2O |
| 7.DB.05 | Svyazhinite | (Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O |
| 7.DB.10 | Khademite | Al(SO4)F · 5H2O |
| 7.DB.10 | Rostite | Al(SO4)(OH) · 5H2O |
| 7.DB.15 | Jurbanite | Al(SO4)(OH) · 5H2O |
| 7.DB.20 | Minasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Orthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Anorthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.25 | Bobjonesite | (V4+O)(SO4) · 3H2O |
| 7.DB.27 | Karpovite | Tl2VO(SO4)2(H2O) |
| 7.DB.30 | Amarantite | Fe3+2(SO4)2O · 7H2O |
| 7.DB.30 | Hohmannite | Fe3+2(SO4)2O · 8H2O |
| 7.DB.30 | Metahohmannite | Fe3+2(SO4)2O · 4H2O |
| 7.DB.35 | Aluminocopiapite | Al2/3Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Calciocopiapite | CaFe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Copiapite | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Magnesiocopiapite | MgFe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Zincocopiapite | ZnFe3+4(SO4)6(OH)2 · 18H2O |
Other Information
Notes:
Soluble in water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Cuprocopiapite
mindat.org URL:
https://www.mindat.org/min-1181.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Cuprocopiapite
Localities for Cuprocopiapite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia | |
| Jim Sharpe |
| |
Chile | |
| Elmar Lackner Collection |
| Kampf +4 other references | |
| samples analysed by Gerhard Mohn and ... | |
| Palache et al. (1951) +1 other reference |
China | |
| Yingxia Xu et al. (2007) |
Greece | |
| Wendel (2000) |
Myanmar | |
| Dill et al. (2013) |
Portugal | |
| Marques de Sá et al. (2010) |
USA | |
| Grant et al. (2005) |
| Lausen (1928) |
| Van Nostrand Reinholt Press: 273 +1 other reference |
| Smith (2016) |
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Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta, Chile