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ferricopiapite

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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
...Juraj Majzlan; Boris Kiefer Abstract We determined the positions of all atoms, including the light ones (D, H), in the crystal structure of synthetic ferricopiapite Fe 14/3 (SO 4 ) 6 (OD,OH) 2 (D 2 O,H 2 O) 20 , using X-ray synchrotron [λ 0.64905(1) Å] and neutron (λ2.0787 Å) powder diffraction...
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View PDF for article title, AN X-RAY- AND NEUTRON-DIFFRACTION STUDY OF SYNTHETIC <span class="search-highlight">FERRICOPIAPITE</span>, 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 MAGNESIOCOPIAPITE, MgFe 4 (SO 4 ) 6 (OH) 2 (H 2 O) 20
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Journal Article

Thermodynamic properties and crystal structure refinement of ferricopiapite, coquimbite, rhomboclase, and Fe 2 (SO 4 ) 3 (H 2 O) 5 Available to Purchase

Juraj MAJZLAN, Alexandra NAVROTSKY, R. Blaine McCLESKEY, Charles N. ALPERS
Published: 01 March 2006
European Journal of Mineralogy (2006) 18 (2): 175–186.
DOI: https://doi.org/10.1127/0935-1221/2006/0018-0175
...Juraj MAJZLAN; Alexandra NAVROTSKY; R. Blaine McCLESKEY; Charles N. ALPERS Abstract Enthalpies of formation of ferricopiapite [nominally Fe 4.67 (SO 4 ) 6 (OH) 2 (H 2 O) 20 ], coquimbite [Fe 2 (SO 4 ) 3 (H 2 O) 9 ], rhomboclase [(H 3 O)Fe(SO 4 ) 2 (H 2 O) 3 ], and Fe 2 (SO 4 ) 3 (H 2 O) 5 were...
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View PDF for article title, Thermodynamic properties and crystal structure refinement of <span class="search-highlight">ferricopiapite</span>, coquimbite, rhomboclase, and Fe 2 (SO 4 ) 3 (H 2 O) 5
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Equilibrium solubility curves for ferricopiapite, hydronium jarosite, and rhomboclase, calculated with the extended Pitzer model of Tosca et al. (2007) and compared to the solubility data from the sources cited in the figure.

Equilibrium solubility curves for ferricopiapite, hydronium jarosite, and r... Available to Purchase

Published: 04 February 2025
Fig. 3. Equilibrium solubility curves for ferricopiapite, hydronium jarosite, and rhomboclase, calculated with the extended Pitzer model of Tosca et al. (2007) and compared to the solubility data from the sources cited in the figure.
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The hydration process of M-Fe2(SO4)3 as recorded by time-resolved XRD data from the GADDS diffractometer. 2𝛉 ranging from 4 to 36.5° is plotted on the horizontal axis. The vertical time axis is marked with the RH steps and their duration. Some peaks are marked with the initials of corresponding mineral names and diffraction index: F = Ferricopiapite; R = Rhomboclase; K = Kornelite; P = Paracoquimbite. Note that the broad peak at 7° is produced by the scattering from Kapton capillary and the chamber wall. (a) M-Fe2(SO4)3 transformed to ferricopiapite and rhomboclase at 50% RH. (b) Kornelite crystallized at 55% RH. Rhomboclase quickly disappeared when RH was raised to 60%, indicated by a sudden drop of the peak intensity at 11.3° along with an apparent shift to higher 2𝛉, caused by the loss of R(020) contribution. Ferricopiapite diffraction peaks also decreased slowly in intensity at 60% RH as kornelite peaks intensified. (c) Kornelite dissolution and ferricopiapite crystallization with a residual solvent phase as RH increased to 68%. (d) The subsequent dehydration process reversed the transition in c as ferricopiapite transformed to kornelite.

The hydration process of M-Fe 2 (SO 4 ) 3 as recorded by time-resolved XRD... Available to Purchase

Published: 01 November 2009
with the initials of corresponding mineral names and diffraction index: F = Ferricopiapite; R = Rhomboclase; K = Kornelite; P = Paracoquimbite. Note that the broad peak at 7° is produced by the scattering from Kapton capillary and the chamber wall. ( a ) M-Fe 2 (SO 4 ) 3 transformed to ferricopiapite
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Synchrotron X-ray-diffraction pattern (taken at room temperature) of the mixture of ferricopiapite and rhomboclase, with the calculated and difference plot from the Rietveld refinement. The upper row of tickmarks shows the calculated position of rhomboclase peaks, the lower row, the position of ferricopiapite peaks.

Synchrotron X-ray-diffraction pattern (taken at room temperature) of the mi... Available to Purchase

Published: 01 October 2006
F ig . 2. Synchrotron X-ray-diffraction pattern (taken at room temperature) of the mixture of ferricopiapite and rhomboclase, with the calculated and difference plot from the Rietveld refinement. The upper row of tickmarks shows the calculated position of rhomboclase peaks, the lower row
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Fig. 1.

The Raman spectra of rhomboclase at 10.5 mW (a), coquimbite at 10.5 mW (b),... Available to Purchase

Published: 15 June 2015
F ig . 1. The Raman spectra of rhomboclase at 10.5 mW (a), coquimbite at 10.5 mW (b), mikasaite at 14 mW (c), copiapite at 7.4 mW (d), ferricopiapite at 7.4 mW (e), intermediate phases between copiapite (ferricopiapite) and mikasaite (f, g), and mikasaite at 18.4 mW (h).
Journal Article

Temperature and humidity effects on ferric sulfate stability and phase transformation Available to Purchase

Wenqian Xu, John B. Parise
Published: 01 February 2012
American Mineralogist (2012) 97 (2-3): 378–383.
DOI: https://doi.org/10.2138/am.2012.3927
...Wenqian Xu; John B. Parise Abstract Evolution of concentrated Fe 2 (SO 4 ) 3 solution, a process including both evaporation of the solution and post-evaporation aging of the precipitates, was studied at 2 and 50 °C under controlled relative humidity (RH). At 50 °C and 42–47% RH, ferricopiapite [Fe...
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View PDF for article title, Temperature and humidity effects on ferric sulfate stability and phase transformation
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Humidity-induced phase transitions of ferric sulfate minerals studied by in situ and ex situ X-ray diffraction Available to Purchase

Wenqian Xu, Nicholas J. Tosca, Scott M. McLennan, John B. Parise
Published: 01 November 2009
American Mineralogist (2009) 94 (11-12): 1629–1637.
DOI: https://doi.org/10.2138/am.2009.3182
... with the initials of corresponding mineral names and diffraction index: F = Ferricopiapite; R = Rhomboclase; K = Kornelite; P = Paracoquimbite. Note that the broad peak at 7° is produced by the scattering from Kapton capillary and the chamber wall. ( a ) M-Fe 2 (SO 4 ) 3 transformed to ferricopiapite...
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View PDF for article title, Humidity-induced phase transitions of ferric sulfate minerals studied by in situ and ex situ X-ray diffraction
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XRD data showing the hydration process of M-Fe2(SO4)3 at 53% RH. Several peaks were marked with the initials of corresponding mineral names, either followed by the index numbers in parentheses or not. F = Ferricopiapite; R = Rhomboclase; K = Kornelite; P = Paracoquimbite. The change of peak intensities clearly shows a phase transformation from ferricopiapite and rhomboclase to kornelite, then to paracoquimbite.

XRD data showing the hydration process of M-Fe 2 (SO 4 ) 3 at 53% RH. Seve... Available to Purchase

Published: 01 November 2009
F igure 5. XRD data showing the hydration process of M-Fe 2 (SO 4 ) 3 at 53% RH. Several peaks were marked with the initials of corresponding mineral names, either followed by the index numbers in parentheses or not. F = Ferricopiapite; R = Rhomboclase; K = Kornelite; P = Paracoquimbite
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STATISTICS OF RIETVELD REFINEMENT AND STRUCTURAL DATA FOR FERRICOPIAPITE, F... Available to Purchase

Published: 01 October 2006
TABLE 1. STATISTICS OF RIETVELD REFINEMENT AND STRUCTURAL DATA FOR FERRICOPIAPITE, Fe 14/3 (SO 4 ) 6 (OD) 2 (D 2 O) 20 , AND RHOMBOCLASE, (D s O 2 )Fe(SO 4 ) 2 (D 2 O 2 ) 2
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A schematic representation of the structure of ferricopiapite. The infinite chains are almost perpendicular to the plane of the projection. The sulfate tetrahedra are light grey and the Fe(O,OH,OH2)6 octahedra are medium grey. The [A(H2O)6] sites are shown as dark octahedra. Hydrogen atoms and isolated H2O molecules are not shown for clarity. Unit-cell edges are outlined by thin solid lines.

A schematic representation of the structure of ferricopiapite. The infinite... Available to Purchase

Published: 01 October 2006
F ig . 1. A schematic representation of the structure of ferricopiapite. The infinite chains are almost perpendicular to the plane of the projection. The sulfate tetrahedra are light grey and the Fe(O,OH,OH 2 ) 6 octahedra are medium grey. The [ A (H 2 O) 6 ] sites are shown as dark octahedra
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HYDROGEN-BONDING SCHEME IN FERRICOPIAPITE* Available to Purchase

Published: 01 October 2006
TABLE 6. HYDROGEN-BONDING SCHEME IN FERRICOPIAPITE*
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Neutron-diffraction pattern (taken at room temperature) of ferricopiapite with the calculated and difference plot from the Rietveld refinement.

Neutron-diffraction pattern (taken at room temperature) of ferricopiapite w... Available to Purchase

Published: 01 October 2006
F ig . 3. Neutron-diffraction pattern (taken at room temperature) of ferricopiapite with the calculated and difference plot from the Rietveld refinement.
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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

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. 3. Equilibrium solubility curves for ferricopiapite, hydronium jarosite, and rhomboclase, calculated with the extended Pitzer model of Tosca et al. (2007) and compared to the solubility data from the sources cited in the figure. ...
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View PDF for article title, Thermodynamic Data of Copiapite-Group Minerals
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FRACTIONAL POSITIONS AND DISPLACEMENT FACTORS FOR ATOMS IN THE FERRICOPIAPI... Available to Purchase

Published: 01 October 2006
TABLE 2. FRACTIONAL POSITIONS AND DISPLACEMENT FACTORS FOR ATOMS IN THE FERRICOPIAPITE STRUCTURE AT ROOM TEMPERATURE
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VNIR reflectance spectra of sample RTNP07. The spectra compare to those of gypsum (JB556) and ferricopiapite (JB620). (Color online.)

VNIR reflectance spectra of sample RTNP07. The spectra compare to those of ... Available to Purchase

Published: 01 July 2014
Figure 9 VNIR reflectance spectra of sample RTNP07. The spectra compare to those of gypsum (JB556) and ferricopiapite (JB620). (Color online.)
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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) .
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Stoichiometric coefficients (ν i ’s in equations 1 and 2 ) for component... Available to Purchase

Published: 01 March 2006
Table 13. Stoichiometric coefficients (ν i ’s in equations 1 and 2 ) for components for estimation of entropy for Fe III sulfates. The formulae of rhomboclase, ferricopiapite, and coquimbite are given in Table 8 .
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Fractional atomic coordinates and isotropic displacement parameters (in Å ... Available to Purchase

Published: 01 March 2006
Table 3. Fractional atomic coordinates and isotropic displacement parameters (in Å 2 ) for ferricopiapite. Occupancy of the sites is 1 unless noted otherwise. Space group and lattice parameters are given in Table 1 .