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Journal Article

Crystal chemistry of povondraite by single-crystal XRD, EMPA, Mössbauer spectroscopy and FTIR Open Access

Ferdinando Bosi, Henrik Skogby, Guy L. Hovis
Published: 28 November 2022
Mineralogical Magazine (2023) 87 (2): 178–185.
DOI: https://doi.org/10.1180/mgm.2022.132
... and fluorine are standard deviations (in brackets). a Calculated by stoichiometry, (Y+Z+T) = 15.00 apfu. b Fe oxidation state determined by Mössbauer spectroscopy. Table 1. Single-crystal X-ray diffraction data details for the povondraite crystals studied. * * Notes: R int...
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View PDF for article title, <span class="search-highlight">Crystal</span> chemistry of povondraite by <span class="search-highlight">single</span>-<span class="search-highlight">crystal</span> XRD, EMPA, <span class="search-highlight">Mössbauer</span> <span class="search-highlight">spectroscopy</span> and FTIR
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Journal Article

Fe 3+ /Fe T ratios of amphiboles determined by high spatial resolution single-crystal synchrotron Mössbauer spectroscopy Available to Purchase

Barbara C. Ratschbacher, Jennifer M. Jackson, Thomas S. Toellner, Claire E. Bucholz, Wolfgang Sturhahn, Natalia V. Solomatova
Published: 03 January 2023
American Mineralogist (2023) 108 (1): 70–86.
DOI: https://doi.org/10.2138/am-2022-8115
... minerals are often zoned and contain inclusions, bulk techniques, e.g., wet chemistry, may not provide accurate Fe 3+ /Fe T values for a single phase of interest. We determined Fe 3+ /Fe T ratios of amphiboles in different crystallographic orientations by single-crystal synchrotron Mössbauer spectroscopy...
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View PDF for article title, Fe 3+ &#x2F;Fe T ratios of amphiboles determined by high spatial resolution <span class="search-highlight">single</span>-<span class="search-highlight">crystal</span> synchrotron <span class="search-highlight">Mössbauer</span> <span class="search-highlight">spectroscopy</span>
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Journal Article

Coupled substitution of Fe 3+ and H + for Si in wadsleyite: A study by polarized infrared and Mössbauer spectroscopies and single-crystal X-ray diffraction Available to Purchase

Takaaki Kawazoe, Alok Chaudhari, Joseph R. Smyth, Catherine McCammon
Published: 01 May 2016
American Mineralogist (2016) 101 (5): 1236–1239.
DOI: https://doi.org/10.2138/am-2016-5625
...Takaaki Kawazoe; Alok Chaudhari; Joseph R. Smyth; Catherine McCammon Abstract Coupled substitution of Fe 3+ and H + for Si in wadsleyite was studied by polarized infrared and Mössbauer spectroscopies and single-crystal X-ray diffraction. Single crystals of Fe-bearing hydrous wadsleyite were...
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View PDF for article title, Coupled substitution of Fe 3+ and H + for Si in wadsleyite: A study by polarized infrared and <span class="search-highlight">Mössbauer</span> <span class="search-highlight">spectroscopies</span> and <span class="search-highlight">single</span>-<span class="search-highlight">crystal</span> X-ray diffraction
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Journal Article

A semi-quantitative approach to derive the electric field gradient, applied to synthetic fayalite, α -Fe 2 SiO 4 : a reappraisal Available to Purchase

Werner Lottermoser, Sven-Ulf Weber, Michael Grodzicki, Armin Kirfel, Georg Amthauer
Published: 01 September 2012
European Journal of Mineralogy (2012) 24 (5): 791–797.
DOI: https://doi.org/10.1127/0935-1221/2012/0024-2199
... 2011 21 12 2011 03 02 2012 © 2012 E. Schweizerbart'sche Verlagsbuchhandlung Science Publishers 2012 electric field gradient synchrotron diffraction single-crystal Mössbauer spectroscopy deformation density semi-quantitative method DFT calculations nanoscope...
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View PDF for article title, A semi-quantitative approach to derive the electric field gradient, applied to synthetic fayalite, α -Fe 2 SiO 4 : a reappraisal
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Journal Article

Multi-analytical characterization of an unusual epidote-supergroup mineral from Malmkärra, Sweden: Toward the new (OH)-analog of dollaseite-(Ce) Available to Purchase

Alice Taddei, Paola Bonazzi, Hans-Jürgen Förster, Patrick Casey, Dan Holtstam, Andreas Karlsson, Luca Bindi
Published: 01 April 2025
American Mineralogist (2025) 110 (4): 594–602.
DOI: https://doi.org/10.2138/am-2024-9438
... electron microprobe, single-crystal X-ray diffraction, Mössbauer, and Fourier-transform infrared spectroscopy (FTIR) techniques. Structure refinements combined with electron microprobe data indicate the following cation populations: A 1 = Ca 0.96 REE 0.03 3 + Mn 0.01 ; A 2 = REE 0.99 3 + Ca 0.01 ; M 1 = Mg...
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View PDF for article title, Multi-analytical characterization of an unusual epidote-supergroup mineral from Malmkärra, Sweden: Toward the new (OH)-analog of dollaseite-(Ce)
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Journal Article

Studies of the crystal structure and crystal chemistry of titanomaghemite Available to Purchase

S. Collyer, N. W. Grimes, D. J. Vaughan, G. Longworth
Published: 01 February 1988
American Mineralogist (1988) 73 (1-2): 153–160.
...S. Collyer; N. W. Grimes; D. J. Vaughan; G. Longworth Abstract A natural single crystal of titanomaghemite from Pretoria, South Africa, containing 8.62 wt% Ti and 54.36 wt% Fe as determined by electron-microprobe analysis, has been studied by X-ray diffraction and Mössbauer spectroscopy. A crystal...
View PDF for article title, Studies of the <span class="search-highlight">crystal</span> structure and <span class="search-highlight">crystal</span> chemistry of titanomaghemite
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Journal Article

The dynamics of Fe oxidation in riebeckite: A model for amphiboles Available to Purchase

Giancarlo Della Ventura, Boriana Mihailova, Umberto Susta, Mariangela Cestelli Guidi, Augusto Marcelli, Jochen Schlüter, Roberta Oberti
Published: 01 July 2018
American Mineralogist (2018) 103 (7): 1103–1111.
DOI: https://doi.org/10.2138/am-2018-6382
... vibrational FTIR and Raman spectroscopies. Combining these results with previous studies performed on the same sample by single-crystal structure refinement and Mössbauer spectroscopy, we conclude that iron oxidation in riebeckite is a multi-step process. (1) In the ∼523 K < T < 623 K temperature range...
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Journal Article

New data on melanostibite, Mn 2 Fe 3+ Sb 5+ O 6 Open Access

Silvia Musetti, Cristian Biagioni, Ulf Hålenius, Elena Bonaccorsi, Federica Zaccarini
Published: 26 August 2022
Mineralogical Magazine (2022) 86 (6): 903–909.
DOI: https://doi.org/10.1180/mgm.2022.102
... County, Sweden, and from the new occurrence, the Scortico–Ravazzone Mn ore deposit, Apuan Alps, Tuscany, Italy. Both specimens were examined through electron microprobe analysis, micro-Raman spectroscopy and single-crystal X-ray diffraction data; Mössbauer spectroscopy was used for the Swedish specimen...
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View PDF for article title, New data on melanostibite, Mn 2 Fe 3+ Sb 5+ O 6
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Journal Article

The high-temperature behaviour of riebeckite: expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles Available to Purchase

Roberta Oberti, Massimo Boiocchi, Michele Zema, Frank C. Hawthorne, Günther J. Redhammer, Umberto Susta, Giancarlo Della Ventura
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 437–449.
DOI: https://doi.org/10.1127/ejm/2018/0030-2712
... by single-crystal XRD analysis of the unit-cell parameters, but starts at 623 K as indicated by Mössbauer spectroscopy on powders (and by changes in the cation distribution observed by structure refinement). FTIR analysis shows that a completely deprotonated oxo-amphibole is obtained after annealing at 893...
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View PDF for article title, The high-temperature behaviour of riebeckite: expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles
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Journal Article

Crystal chemistry of trioctahedral micas-2 M 1 from Bunyaruguru kamafugite (southwest Uganda) Available to Purchase

Fernando Scordari, Emanuela Schingaro, Maria Lacalamita, Ernesto Mesto
Published: 01 February 2012
American Mineralogist (2012) 97 (2-3): 430–439.
DOI: https://doi.org/10.2138/am.2012.3896
...Fernando Scordari; Emanuela Schingaro; Maria Lacalamita; Ernesto Mesto Abstract The crystal chemistry of 2 M 1 micas from Bunyaruguru kamafugite (southwest Uganda) was studied by electron probe microanalysis, single-crystal X-ray diffraction, Mössbauer and Fourier transform infrared spectroscopy...
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View PDF for article title, <span class="search-highlight">Crystal</span> chemistry of trioctahedral micas-2 M 1 from Bunyaruguru kamafugite (southwest Uganda)
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Journal Article

Crystal chemistry of melanites from Mt. Vulture (southern Italy) Available to Purchase

Fernando Scordari, Emanuela Schingaro, Giuseppe Pedrazzi
Published: 01 October 1999
European Journal of Mineralogy (1999) 11 (5): 855–869.
...Fernando Scordari; Emanuela Schingaro; Giuseppe Pedrazzi Abstract Melanites from Mt. Vulture, an extinct volcano located in the South of Italy (Potenza, Basilicata), have been investigated via electron probe microanalysis (EPMA), single crystal X-ray diffraction (XRD) analysis, Mossbauer...
View PDF for article title, <span class="search-highlight">Crystal</span> chemistry of melanites from Mt. Vulture (southern Italy)
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Journal Article

From Structure Topology To Chemical Composition. Xix. Titanium Silicates: Revision of the Crystal Structure and Chemical Formula of Bafertisite, Ba 2 Fe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F 2 , a Group-ii Ts-block Mineral Available to Purchase

Fernando CÁmara, Elena Sokolova, Yassir A. Abdu, Leonid A. Pautov
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 49–63.
DOI: https://doi.org/10.3749/canmin.1500059
... of bafertisite needed to be revised. We studied three samples of bafertisite by electron-microprobe analysis, Mössbauer spectroscopy, IR and Raman spectroscopy, and single-crystal X-ray diffraction. These samples are from (1) the Bayan Obo REE deposit, Inner Mongolia, China (holotype, sample 61513, Fersman...
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View PDF for article title, From Structure Topology To Chemical Composition. Xix. Titanium Silicates: Revision of the <span class="search-highlight">Crystal</span> Structure and Chemical Formula of Bafertisite, Ba 2 Fe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F 2 , a Group-ii Ts-block Mineral
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Journal Article

Fundamental Mössbauer parameters of synthetic Ca-Mg-Fe pyroxenes Available to Purchase

M. Darby Dyar, Rachel L. Klima, Alexandra Fleagle, Samantha E. Peel
Published: 01 July 2013
American Mineralogist (2013) 98 (7): 1172–1186.
DOI: https://doi.org/10.2138/am.2013.4333
... occupancies are measured using some combination of single-crystal structure refinements (SREF) from X-ray diffraction data and Mössbauer spectroscopy for bulk measurements. The vast majority of previous Mössbauer studies have been hampered by the lack of differential recoil-free fraction data that describe...
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View PDF for article title, Fundamental <span class="search-highlight">Mössbauer</span> parameters of synthetic Ca-Mg-Fe pyroxenes
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Journal Article

STOICHIOMETRIC ARSENOPYRITE, FeAsS, FROM LA ROCHE-BALUE QUARRY, LOIRE-ATLANTIQUE, FRANCE: CRYSTAL STRUCTURE AND MÖSSBAUER STUDY Available to Purchase

Luca Bindi, Yves MOËLO, Philippe Léone, Michel Suchaud
Published: 01 April 2012
The Canadian Mineralogist (2012) 50 (2): 471–479.
DOI: https://doi.org/10.3749/canmin.50.2.471
...Luca Bindi; Yves MOËLO; Philippe Léone; Michel Suchaud Abstract Arsenopyrite from La Roche-Balue quarry (Loire-Atlantique department, France), with the stoichiometric composition FeAsS, has been studied by X-ray single-crystal diffraction and 57 Fe Mössbauer spectroscopy. Its unit cell is a 5.7612...
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View PDF for article title, STOICHIOMETRIC ARSENOPYRITE, FeAsS, FROM LA ROCHE-BALUE QUARRY, LOIRE-ATLANTIQUE, FRANCE: <span class="search-highlight">CRYSTAL</span> STRUCTURE AND <span class="search-highlight">MÖSSBAUER</span> STUDY
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Journal Article

Crystal chemistry and light elements analysis of Ti-rich garnets Available to Purchase

Emanuela Schingaro, Maria Lacalamita, Ernesto Mesto, Gennaro Ventruti, Giuseppe Pedrazzi, Luisa Ottolini, Fernando Scordari
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 371–384.
DOI: https://doi.org/10.2138/am-2016-5439
...), single-crystal X-ray diffraction (SCXRD), Mössbauer spectroscopy, and secondary ion mass spectrometry (SIMS) to better characterize their crystal chemistry. The studied garnets show TiO 2 varying in the range of 4.9(1) to 17.1(2) wt% and variable Fe 3+ /∑Fe content. SIMS analyses allowed quantification...
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View PDF for article title, <span class="search-highlight">Crystal</span> chemistry and light elements analysis of Ti-rich garnets
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Thermal expansion of römerite under low-temperature conditions Available to Purchase

Eli Bird, Olivia S. Pardo, Nina Gilkyson, Jennifer M. Jackson
Published: 01 June 2025
American Mineralogist (2025) 110 (6): 933–940.
DOI: https://doi.org/10.2138/am-2024-9432
... temperatures relevant to the planetary environments in question. We characterized single crystals of römerite with time-domain Mössbauer spectroscopy, Raman spectroscopy, and X-ray diffraction methods. Through our X-ray diffraction experiment, we refined the unit-cell parameters of the crystal between 100...
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View PDF for article title, Thermal expansion of römerite under low-temperature conditions
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Ti-rich phlogopite from Mt. Vulture (Potenza, Italy) investigated by a multianalytical approach : substitutional mechanisms and orientation of the OH dipoles Available to Purchase

Fernando SCORDARI, Gennaro VENTRUTI, Anna SABATO, Fabio BELLATRECCIA, Giancarlo DELLA VENTURA, Giuseppe PEDRAZZI
Published: 01 May 2006
European Journal of Mineralogy (2006) 18 (3): 379–391.
DOI: https://doi.org/10.1127/0935-1221/2006/0018-0379
... refinement (SREF = Structure REFinement), electron-micro-probe analysis (EMPA), C-H-N microelemental analysis for H, Mossbauer spectroscopy for Fe 3+ /Fe 2+ analysis, and Fourier transform infrared (FTIR) spectroscopy on single crystal by polarized light to characterize the local structural environments...
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View PDF for article title, Ti-rich phlogopite from Mt. Vulture (Potenza, Italy) investigated by a multianalytical approach : substitutional mechanisms and orientation of the OH dipoles
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Journal Article

Tetrahedral aluminum in tourmaline from a spinel-pargasite-metamorphosed mafic-ultramafic rock Available to Purchase

Oleg S. Vereshchagin, Yuliya D. Gritsenko, Marina F. Vigasina, Sergey K. Dedushenko, Liudmila A. Gorelova, Leonid A. Pautov, Atali A. Agahanov, Irina A. Chernyshova, Anatoly A. Zolotarev
Published: 01 November 2024
American Mineralogist (2024) 109 (11): 1841–1849.
DOI: https://doi.org/10.2138/am-2023-9170
... substitution tetrahedral aluminum single-crystal X-ray diffraction Raman spectroscopy infrared spectroscopy Mössbauer spectroscopy LA-ICP-OES EMPA Lithium, Beryllium, and Boron: Quintessentially Crustal The sample is a 5 × 6 cm fragment of dark gray fine-grained rock containing a 4 × 5 cm...
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View PDF for article title, Tetrahedral aluminum in tourmaline from a spinel-pargasite-metamorphosed mafic-ultramafic rock
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Vesuvianite as a key tool for the reconstruction of skarn formation conditions: An example from the Sauce Chico Complex, Argentina Available to Purchase

Carlos A. Ballivián Justiniano, Maricel G. Rodríguez, Taras L. Panikorovskii, Manuela E. Benítez, Clemente Recio, Cinthia P. Ramos, Mabel E. Lanfranchini, Florencia Di Salvo
Published: 17 January 2025
American Mineralogist (2025)
DOI: https://doi.org/10.2138/am-2024-9588
...-coupled mass and atomic emission spectrometry, Raman and Mössbauer spectroscopy, X-ray (powder and single crystal) diffraction, and fluid inclusions and stable isotope analyses. The averaged composition of the Loma Marcelo skarn vesuvianite is X Ca 19.00 Y (Al 9.57 Fe 2+ 1.29 Fe 3+ 0.50 Mg 1.17 Ti 0.48 Mn...
View PDF for article title, Vesuvianite as a key tool for the reconstruction of skarn formation conditions: An example from the Sauce Chico Complex, Argentina
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Incorporation of tetrahedral ferric iron into hydrous ringwoodite Available to Purchase

Andrew R. Thomson, Ross O. Piltz, Wilson A. Crichton, Valerio Cerantola, Isra S. Ezad, David P. Dobson, Ian G. Wood, John P. Brodholt
Published: 01 June 2021
American Mineralogist (2021) 106 (6): 900–908.
DOI: https://doi.org/10.2138/am-2021-7539
... using electron microprobe analysis, Raman spectroscopy, infrared spectroscopy, synchrotron Mössbauer spectroscopy, single-crystal X-ray diffraction, and single-crystal Laue neutron diffraction, to carefully characterize the chemistry and crystallography of the samples. Analysis of the combined data sets...
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View PDF for article title, Incorporation of tetrahedral ferric iron into hydrous ringwoodite
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