Magnesiocopiapite
A valid IMA mineral species - grandfathered
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About Magnesiocopiapite
Formula:
MgFe3+4(SO4)6(OH)2 · 20H2O
Hardness:
2½ - 3
Crystal System:
Triclinic
Member of:
Name:
In allusion to its composition with dominant MAGNESIum and its relationship to COPIAPITE.
Type Locality:
Unique Identifiers
Mindat ID:
2486
Long-form identifier:
mindat:1:1:2486:6
IMA Classification of Magnesiocopiapite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
MgFe3+4(S6+O4)6(OH)2·20H2O
Classification of Magnesiocopiapite
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
31.10.5.2
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 for Standard |
|---|---|---|
| Mcpi | 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 Magnesiocopiapite
Hardness:
2½ - 3 on Mohs scale
Chemistry of Magnesiocopiapite
Mindat Formula:
MgFe3+4(SO4)6(OH)2 · 20H2O
Element Weights:
Crystallography of Magnesiocopiapite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.3451(4) Å, b = 18.794(1) Å, c = 7.3891(4) Å
α = 91.369(5)°, β = 102.169(4)°, γ = 98.831(4)°
α = 91.369(5)°, β = 102.169(4)°, γ = 98.831(4)°
Ratio:
a:b:c = 0.391 : 1 : 0.393
Unit Cell V:
983.6 ų
Comment:
Synthetic (Majzlan & Michallik, 2007).
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0010726 | Magnesiocopiapite | Susse P (1972) Crystal structure and hydrogen bonding of copiapite Zeitschrift fur Kristallographie 135 34-55 |  | 1972 | Alcaparrosa, Chile | 0 | 293 |
| 0006122 | Magnesiocopiapite | Majzlan J, Kiefer B (2006) An X-ray and neutron-diffraction study of synthetic ferricopiapite, Fe14/3(SO4)6(OD,OH)2(D2O,H2O)20, and ab-initio calculations on the structure of magnesiocopiapite MgFe4(SO4)6(OH)2(H2O)20 The Canadian Mineralogist 44 1227-1237 | | 2006 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 18.57 Å | (90) |
| 9.29 Å | (100) |
| 6.192 Å | (45) |
| 5.600 Å | (80) |
| 4.208 Å | (40) |
| 3.588 Å | (50) |
| 3.506 Å | (40) |
Comments:
Sample from Knoxville, California, USA.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 50 : Coal and/or oil shale minerals | <0.36 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Magnesiocopiapite
Place of Conservation of Type Material:
No designated type specimen.
Associated Minerals at Type Locality:
Other Language Names for Magnesiocopiapite
Dutch:Magnesiocopiapiet
German:Magnesiocopiapit
Japanese:苦土コピアポ石
Simplified Chinese:镁叶绿矾
Spanish:Magnesiocopiapita
Varieties of Magnesiocopiapite
| Knoxvillite | A chromiferous iron sulphate, not IMA-approved. May be a mixture of magnesiocopiapite and redingtonite, or could be a chromiferous variety of magnesiocopiapite. Originally reported from Redington Mine, Knoxville, Napa Co., California, USA. Identity of ... |
Relationship of Magnesiocopiapite to other Species
Member of:
Other Members of Copiapite 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 |
| Cuprocopiapite | Cu2+Fe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O | Tric. 1 : P1 |
| Zincocopiapite | ZnFe3+4(SO4)6(OH)2 · 18H2O | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
| 19 photos of Magnesiocopiapite associated with Pickeringite | MgAl2(SO4)4 · 22H2O |
| 18 photos of Magnesiocopiapite associated with Römerite | Fe2+Fe3+2(SO4)4 · 14H2O |
| 13 photos of Magnesiocopiapite associated with Halotrichite | Fe2+Al2(SO4)4 · 22H2O |
| 12 photos of Magnesiocopiapite associated with Metavoltine | K2Na6Fe2+Fe3+6O2(SO4)12 · 18H2O |
| 4 photos of Magnesiocopiapite associated with Krausite | KFe(SO4)2 · H2O |
| 4 photos of Magnesiocopiapite associated with Fibroferrite | Fe3+(SO4)(OH) · 5H2O |
| 4 photos of Magnesiocopiapite associated with Szomolnokite | FeSO4 · H2O |
| 4 photos of Magnesiocopiapite associated with Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| 2 photos of Magnesiocopiapite associated with Native Sulphur | S8 |
| 1 photo of Magnesiocopiapite associated with Rokühnite | FeCl2 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DB.05 | Svyazhinite | (Mg,Mn2+,Ca)(Al,Fe3+)(SO4)2F · 14H2O |
| 7.DB.05 | Aubertite | CuAl(SO4)2Cl · 14H2O |
| 7.DB.05 | Magnesioaubertite | (Mg,Cu)Al(SO4)2Cl · 14H2O |
| 7.DB.10 | Rostite | Al(SO4)(OH) · 5H2O |
| 7.DB.10 | Khademite | Al(SO4)F · 5H2O |
| 7.DB.15 | Jurbanite | Al(SO4)(OH) · 5H2O |
| 7.DB.20 | Minasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Anorthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.20 | Orthominasragrite | (V4+O)(SO4) · 5H2O |
| 7.DB.25 | Bobjonesite | (V4+O)(SO4) · 3H2O |
| 7.DB.27 | Karpovite | Tl2VO(SO4)2(H2O) |
| 7.DB.30 | Metahohmannite | Fe3+2(SO4)2O · 4H2O |
| 7.DB.30 | Hohmannite | Fe3+2(SO4)2O · 8H2O |
| 7.DB.30 | Amarantite | Fe3+2(SO4)2O · 7H2O |
| 7.DB.35 | Calciocopiapite | CaFe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Zincocopiapite | ZnFe3+4(SO4)6(OH)2 · 18H2O |
| 7.DB.35 | Aluminocopiapite | Al2/3Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Copiapite | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Cuprocopiapite | Cu2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7.DB.35 | Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O |
Other Information
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 Magnesiocopiapite
mindat.org URL:
https://www.mindat.org/min-2486.html
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References for Magnesiocopiapite
Reference List:
Bayliss, P., Atencio, D. (1985) X-ray powder-diffraction data and cell parameters for copiapite-group minerals. The Canadian Mineralogist, 23 (1) 53-56
Localities for Magnesiocopiapite
Showing 80 localities.
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 | |
| Ashley et al. (1999) |
Austria | |
| Taucher (1993) +2 other references |
| Kolitsch (2017) |
| Kolitsch et al. (2022) | |
| Meixner (1954) |
Bolivia | |
| Moricz et al. (2009) |
Brazil | |
| Atencio et al. (2011) |
Bulgaria | |
| Dimitrova +2 other references |
Canada | |
| Zodrow (1980) |
Chile | |
| SEM-EDS by Joy Desor |
| G. Möhn & J. Desor | |
| SEM-EDS by Igor V. Pekov | |
| samples analysed by Gerhard Moehn and ... +5 other references |
China | |
| Yao +6 other references |
| Kaiyin Bai and Zhaoxin Han (2007) |
Costa Rica | |
| Rodríguez et al. (2017) |
| Ulloa et al. (2018) |
Czech Republic | |
| Rost (1937) +1 other reference |
| Hyrsl J. +1 other reference |
| Jirásek (2001) |
| Matýsek et al. (2014) |
| Matýsek et al. (2014) |
| Matýsek et al. (2014) |
| Matýsek et al. (2024) |
| Hršelová et al. (2013) |
France | |
| Lheur et al. (2011) |
| Gol et al. (2010) |
| Gol et al. (2010) | |
| Bourgoin et al. (2011) |
Germany | |
| Giesler et al. (2020) |
| Nasdala et al. (1992) |
| Wittern (2001) |
| Witzke et al. (1998) |
| Gerstenberg et al. (11/21) |
Greece | |
| Schnorrer (1995) +2 other references |
| Rieck (n.d.) | |
| Rieck (n.d.) |
| Rieck (n.d.) | |
Hungary | |
| Lovász A. (2014) |
| Szakáll: Minerals of Rudabánya |
| Szakáll et al. (1997) | |
| Geoda - Journal of the Hungarian ... |
Iran | |
| Khorasanipour et al. (2011) |
Italy | |
| Russo et al. (2017) |
| Piccoli et al. (2007) |
| Piccoli et al. (2007) |
| Fernando Caboni et al. (2024) |
| Fernando Caboni et al. (2024) | |
| Mauro (2020) |
| Mauro D. (2016) +1 other reference | |
Peru | |
| Tyc et al. (2022) |
| Tyc et al. (2022) | |
| Hyršl (2010) +1 other reference |
Poland | |
| Siuda (2004) +2 other references |
| Mochnacka et al. (2015) |
| Kruszewski (2013) |
| Kruszewski et al. (2020) |
Slovakia | |
| Koděra et al. (1986) |
Spain | |
| Frost et al. (2007) |
| Georges FAVREAU collection & EDX ... | |
| Sainz de Baranda Graf et al. (2025) +1 other reference |
| Romero et al. (2006) +1 other reference |
| Joan Rosell (2022) |
| Rosell-Riba et al. (2022) |
| Joan Abella i Creus (Joanabellacreus@gmail.com) |
| Crespo et al. (2017) |
Switzerland | |
| Stalder et al. (1998) +1 other reference |
| Ansermet (2012) |
| Ansermet (2012) | |
USA | |
| Williams et al. (1995) |
| Bayliss et al. (1985) +1 other reference |
| [var: Knoxvillite] Melville et al. (1890) +3 other references |
| Berry (1939) +1 other reference |
| Jamieson et al. (2005) |
| Eckel et al. (1997) |
| Northrop et al. (1996) |
| Environmental Geology: 45: 47. +1 other reference |
| Coskren et al. (2000) +1 other reference |
| Dietrich (1990) |
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Wieściszowice, Gmina Marciszów, Kamienna Góra County, Lower Silesian Voivodeship, Poland