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magnesiocopiapite

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Journal Article

AN X-RAY- AND NEUTRON-DIFFRACTION STUDY OF SYNTHETIC FERRICOPIAPITE, Fe 14/3 (SO 4 ) 6 (OD,OH) 2 (D 2 O,H 2 O) 20 , AND AB INITIO CALCULATIONS ON THE STRUCTURE OF MAGNESIOCOPIAPITE, MgFe 4 (SO 4 ) 6 (OH) 2 (H 2 O) 20 Available to Purchase

Juraj Majzlan, Boris Kiefer
Published: 01 October 2006
The Canadian Mineralogist (2006) 44 (5): 1227–1237.
DOI: https://doi.org/10.2113/gscanmin.44.5.1227
... by infrared spectroscopy. The results of the diffraction study are supported by ab initio calculations of the structure of magnesiocopiapite, MgFe 4 (SO 4 ) 6 (OH) 2 (H 2 O) 20 . Neutron-diffraction data were collected at both room and low (~16 K) temperature. The X-ray-diffraction pattern was collected...
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View PDF for article title, AN X-RAY- AND NEUTRON-DIFFRACTION STUDY OF SYNTHETIC FERRICOPIAPITE, Fe 14&#x2F;3 (SO 4 ) 6 (OD,OH) 2 (D 2 O,H 2 O) 20 , AND AB INITIO CALCULATIONS ON THE STRUCTURE OF <span class="search-highlight">MAGNESIOCOPIAPITE</span>, MgFe 4 (SO 4 ) 6 (OH) 2 (H 2 O) 20
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Crystal structure of magnesiocopiapite, projected approximately onto the 101 plane. The heteropolyhedral chains are nearly perpendicular to the projection plane.

Crystal structure of magnesiocopiapite, projected approximately onto the 10... Available to Purchase

Published: 04 February 2025
Fig. 1. Crystal structure of magnesiocopiapite, projected approximately onto the 101 plane. The heteropolyhedral chains are nearly perpendicular to the projection plane.
Journal Article

THE ROLE OF EFFLORESCENT SULFATES IN THE STORAGE OF TRACE ELEMENTS IN STREAM WATERS POLLUTED BY ACID MINE-DRAINAGE: THE CASE OF PEÑA DEL HIERRO, SOUTHWESTERN SPAIN Available to Purchase

Antonio Romero, Isabel González, Emilio Galán
Published: 01 December 2006
The Canadian Mineralogist (2006) 44 (6): 1431–1446.
DOI: https://doi.org/10.2113/gscanmin.44.6.1431
...). The precipitates consist of Fe, Mg and Al sulfates, rich in trace elements ( e.g. , >1000 ppm Cu and Zn, >500 ppm As and Co, up to 28 ppm Cd). The mineralogy is dominated by coquimbite, magnesiocopiapite and pickeringite, and occasionally, rhomboclase, alpersite, epsomite, hexahydrite and starkeyite...
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View PDF for article title, THE ROLE OF EFFLORESCENT SULFATES IN THE STORAGE OF TRACE ELEMENTS IN STREAM WATERS POLLUTED BY ACID MINE-DRAINAGE: THE CASE OF PEÑA DEL HIERRO, SOUTHWESTERN SPAIN
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BSE images: (a) spherical aggregates of tabular magnesiocopiapite; (b) tabular magnesiocopiapite; (c) grains to poorly developed crystals of Mg-sulfates, probably hexahydrite (dark) between halite crystals, with a coating of natrojarosite crystals visible in the top left; (d) acicular pickeringite on prismatic epsomite crystals, (e) crystal aggregate of blödite enclosed in a mixture of Mg-sulfates with disseminated halite; (f) powdery aggregate with predominant ferrohexahydrite on coal. (a, c, d and e): site 4 – Karviná Mine, ČSA Mining Plant; (b): site 2 Dukla Mine; (f): Lazy Mine.

BSE images: ( a ) spherical aggregates of tabular magnesiocopiapite; ( b ) ... Available to Purchase

Published: 01 October 2014
F ig . 5. BSE images: ( a ) spherical aggregates of tabular magnesiocopiapite; ( b ) tabular magnesiocopiapite; ( c ) grains to poorly developed crystals of Mg-sulfates, probably hexahydrite (dark) between halite crystals, with a coating of natrojarosite crystals visible in the top left; ( d
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RESULTS OF SPOT ANALYSES OF MAGNESIOCOPIAPITE CRYSTALS Available to Purchase

Published: 01 December 2006
TABLE 6. RESULTS OF SPOT ANALYSES OF MAGNESIOCOPIAPITE CRYSTALS
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FRACTIONAL POSITIONS OF ATOMS IN THE STRUCTURE OF MAGNESIOCOPIAPITE Available to Purchase

Published: 01 October 2006
TABLE 3. FRACTIONAL POSITIONS OF ATOMS IN THE STRUCTURE OF MAGNESIOCOPIAPITE
Journal Article

Minerals formed by the weathering of sulfides in mines of the Czech part of the Upper Silesian Basin Available to Purchase

D. Matýsek, J. Jirásek, M. Osovský, P. Skupien
Published: 01 October 2014
Mineralogical Magazine (2014) 78 (5): 1265–1286.
DOI: https://doi.org/10.1180/minmag.2014.078.5.12
...F ig . 5. BSE images: ( a ) spherical aggregates of tabular magnesiocopiapite; ( b ) tabular magnesiocopiapite; ( c ) grains to poorly developed crystals of Mg-sulfates, probably hexahydrite (dark) between halite crystals, with a coating of natrojarosite crystals visible in the top left; ( d...
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View PDF for article title, Minerals formed by the weathering of sulfides in mines of the Czech part of the Upper Silesian Basin
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BOND DISTANCES FOR HEAVY ATOMS IN FERRICOPIAPITE* AND MAGNESIOCOPIAPITE § Available to Purchase

Published: 01 October 2006
TABLE 4. BOND DISTANCES FOR HEAVY ATOMS IN FERRICOPIAPITE* AND MAGNESIOCOPIAPITE §
Journal Article

Hydrated sulfates from Sydney Coalfield, Cape Breton Island, Nova Scotia, Canada: the copiapite group Available to Purchase

Erwin L. Zodrow
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 961–967.
..., magnesiocopiapite, and even ferroan magnesiocopiapite. It appears that different parts in the coalfield represent different environments as judged by the chemical composition of the sampled copiapites. Copyright © 1980 by the Mineralogical Society of America 1980 ...
View PDF for article title, Hydrated sulfates from Sydney Coalfield, Cape Breton Island, Nova Scotia, Canada: the copiapite group
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Journal Article

Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: Intensification of color in ferric iron clusters bridged by a single hydroxide ion Available to Purchase

George R. Rossman
Published: 01 August 1975
American Mineralogist (1975) 60 (7-8): 698–704.
...George R. Rossman Abstract Optical and infrared spectroscopic data and magnetic susceptibility data are reported for the ferric hydroxy-sulfate minerals magnesiocopiapite and botryogen and the related mineral coquimbite. The physical propertiesof intensity of color, pleochroism, and magnetic...
View PDF for article title, Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: Intensification of color in ferric iron clusters bridged by a single hydroxide ion
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BOND DISTANCES AND BOND ANGLES FOR OXYGEN AND DEUTERIUM ATOMS IN FERRICOPIA... Available to Purchase

Published: 01 October 2006
TABLE 5. BOND DISTANCES AND BOND ANGLES FOR OXYGEN AND DEUTERIUM ATOMS IN FERRICOPIATITE* AND OXYGEN AND HYDROGEN ATOMS IN MAGNESIOCOPIAPITE §
Journal Article

Thermodynamic Data of Copiapite-Group Minerals Available to Purchase

Juraj Majzlan, Edgar Dachs, Artur Benisek
Published: 04 February 2025
The Canadian Journal of Mineralogy and Petrology (2025) 63 (1): 79–89.
DOI: https://doi.org/10.3749/2400018
...Fig. 1. Crystal structure of magnesiocopiapite, projected approximately onto the 101 plane. The heteropolyhedral chains are nearly perpendicular to the projection plane. ...
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View PDF for article title, Thermodynamic Data of Copiapite-Group Minerals
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Scanning electron micrograph showing magnesiocopiapite (plates 10–50 μm in diameter) and Al-bearing ferricopiapite (spheroidal rosettes). Reproduced with permission from Robinson (1999).

Scanning electron micrograph showing magnesiocopiapite (plates 10–50 μm in ... Available to Purchase

Published: 01 January 2000
Figure 7. Scanning electron micrograph showing magnesiocopiapite (plates 10–50 μm in diameter) and Al-bearing ferricopiapite (spheroidal rosettes). Reproduced with permission from Robinson (1999) .
Image
Fragments of the structure of magnesiocopiapite (structural type MG) and ferricopiapite (structural type AL) projected onto 1̅01. The isolated octahedra that house the A cations are shown as light grey, the infinite chains as dark grey. The main differences between the two structural types are in the orientation of the isolated octahedra (marked by arrows labelled 1) and the orientation of the sulphate tetrahedra within the infinite chains (marked by arrows labelled 2).

Fragments of the structure of magnesiocopiapite (structural type MG) and fe... Available to Purchase

Published: 01 October 2007
F ig . 1. Fragments of the structure of magnesiocopiapite (structural type MG) and ferricopiapite (structural type AL) projected onto 1̅01. The isolated octahedra that house the A cations are shown as light grey, the infinite chains as dark grey. The main differences between the two structural
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Absorption edge spectra (left) and their first derivatives (right), for selected weathering products, and reference compounds scorodite and segnitite, for comparison. Sample HP015 is dominated by hexahydrite, sample HP023 by goethite, and sample HP045 by magnesiocopiapite. Arsenic is As(V) in all of the samples.

Absorption edge spectra (left) and their first derivatives (right), for sel... Available to Purchase

Published: 01 December 2009
F ig . 11. Absorption edge spectra (left) and their first derivatives (right), for selected weathering products, and reference compounds scorodite and segnitite, for comparison. Sample HP015 is dominated by hexahydrite, sample HP023 by goethite, and sample HP045 by magnesiocopiapite. Arsenic
Journal Article

Cuyaite, Ca 2 Mn 3+ As 3+ 14 O 24 Cl, a new mineral with an arsenite framework from near Cuya, Camarones Valley, Chile. Available to Purchase

Anthony R. Kampf, Stuart J. Mills, Barbara Nash, Maurizio Dini, Arturo A. Molina Donoso
Published: 27 April 2020
Mineralogical Magazine (2020) 84 (3): 477–484.
DOI: https://doi.org/10.1180/mgm.2020.31
..., calcite, claudetite, ferrinatrite, gajardoite-3 R , leiteite, magnesiocopiapite, phosphosiderite, pyrite, realgar and talmessite and formed from the oxidation of As-bearing primary phases and alteration by saline fluids derived from evaporating meteoric water under hyperarid conditions. Cuyaite occurs...
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View PDF for article title, Cuyaite, Ca 2 Mn 3+ As 3+ 14 O 24 Cl, a new mineral with an arsenite framework from near Cuya, Camarones Valley, Chile.
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Journal Article

Magnesiovoltaite, K 2 Mg 5 Fe 3+ 3 Al(SO 4 ) 12 ·18H 2 O, a new mineral from the Alcaparrosa mine, Antofagasta region, Chile Available to Purchase

Nikita V. Chukanov, Sergey M. Aksenov, Ramiza K. Rastsvetaeva, Gerhard Möhn, Vyacheslav S. Rusakov, Igor V. Pekov, Ricardo Scholz, Tatiana A. Eremina, Dmitriy I. Belakovskiy, Joachim A. Lorenz
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (5): 1005–1017.
DOI: https://doi.org/10.1127/ejm/2016/0028-2565
... Alcaparrosa, El Loa province, Antofagasta region, Chile, in two associations, one of which includes coquimbite, tamarugite, alum-(Na), rhomboclase, yavapaiite, voltaite and opal, and the other one is botryogen, opal, tamarugite, alum-(K), pickeringite, magnesiocopiapite, and jarosite. Magnesiovoltaite forms...
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View PDF for article title, Magnesiovoltaite, K 2 Mg 5 Fe 3+ 3 Al(SO 4 ) 12 ·18H 2 O, a new mineral from the Alcaparrosa mine, Antofagasta region, Chile
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Image
Sequence of mineral precipitation according to the chemical composition of the stream water. After rains (March 2002), stream water are poor in Mg and rich in Fe, leading to coquimbite precipitation. As Mg concentrations increase in the water, magnesiocopiapite starts to precipitate. When water reaches high Al and Mg concentration the prevalent phases are pickeringite and epsomite.

Sequence of mineral precipitation according to the chemical composition of ... Available to Purchase

Published: 01 December 2006
F ig . 4. Sequence of mineral precipitation according to the chemical composition of the stream water. After rains (March 2002), stream water are poor in Mg and rich in Fe, leading to coquimbite precipitation. As Mg concentrations increase in the water, magnesiocopiapite starts to precipitate
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BSE images: (a) cubic crystals of halite; (b) crystals of sulfur (Sul) and melanterite (Mel); (c) crystals of probable rokühnite on magnesiocopiapite; (d) aggregate of needle-like crystals of Ca-sulfate containing Sr and REE adjacent to smaller, radial aggregates of celestine, tiny crystals of natrojarosite (Njrs) and several needles of gypsum. (a, c and d): site 4: Karviná Mine, ČSA Mining Plant; (b): site 3: Darkov Mine, Barbora Mining Plant.

BSE images: ( a ) cubic crystals of halite; ( b ) crystals of sulfur (Sul) ... Available to Purchase

Published: 01 October 2014
F ig . 6. BSE images: ( a ) cubic crystals of halite; ( b ) crystals of sulfur (Sul) and melanterite (Mel); ( c ) crystals of probable rokühnite on magnesiocopiapite; ( d ) aggregate of needle-like crystals of Ca-sulfate containing Sr and REE adjacent to smaller, radial aggregates of celestine
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Typical sample locations for efflorescent salts. (a) Encrustation of alunogen and magnesiocopiapite (sample 4b), field of view is c. 0.5 m; (b) stalactites of alunogen (sample 10c), field of view is c. 1 m; (c) encrustation of salt of unknown mineralogy near the surface of a pit lake (site #4, see Fig. 1), field of view is c. 3 m; (d) encrustation of salt of unknown mineralogy on the surface of an open pit highwall (site #4, see Fig. 1), pencil for scale.

Typical sample locations for efflorescent salts. ( a ) Encrustation of alun... Available to Purchase

Published: 20 February 2019
Fig. 2. Typical sample locations for efflorescent salts. ( a ) Encrustation of alunogen and magnesiocopiapite (sample 4b), field of view is c. 0.5 m; ( b ) stalactites of alunogen (sample 10c), field of view is c. 1 m; ( c ) encrustation of salt of unknown mineralogy near the surface of a pit