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Roberta Oberti
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Journal Article
Oxidation or cation re-arrangement? Distinct behavior of riebeckite at high temperature
Giancarlo Della Ventura, Günther J. Redhammer, Federico Galdenzi, Gennaro Ventruti, Umberto Susta, Roberta Oberti, Francesco Radica, Augusto Marcelli
Publisher: Mineralogical Society of America
Published: 03 January 2023
American Mineralogist (2023) 108 (1): 59–69.
Journal Article
Ferro-papikeite, ideally Na F e 2 2 + ( F e 3 2 + Al 2 )(Si 5 Al 3 )O 22 (OH) 2 , a new orthorhombic amphibole from Nordmark (Western Bergslagen), Sweden: Description and crystal structure
Frank C. Hawthorne, Maxwell C. Day, Mostafa Fayek, Kees Linthout, Wim. J. Lustenhouwer, Roberta Oberti
Publisher: Mineralogical Society of America
Published: 01 February 2022
American Mineralogist (2022) 107 (2): 306–312.
Journal Article
Thermoelasticity, cation exchange, and deprotonation in Fe-rich holmquistite: Toward a crystal-chemical model for the high-temperature behavior of orthorhombic amphiboles
Publisher: Mineralogical Society of America
Published: 01 December 2019
American Mineralogist (2019) 104 (12): 1829–1839.
Journal Article
The dynamics of Fe oxidation in riebeckite: A model for amphiboles
Giancarlo Della Ventura, Boriana Mihailova, Umberto Susta, Mariangela Cestelli Guidi, Augusto Marcelli, Jochen Schlüter, Roberta Oberti
Publisher: Mineralogical Society of America
Published: 01 July 2018
American Mineralogist (2018) 103 (7): 1103–1111.
Journal Article
AMFORM, a new mass-based model for the calculation of the unit formula of amphiboles from electron microprobe analyses
Publisher: Mineralogical Society of America
Published: 01 July 2018
American Mineralogist (2018) 103 (7): 1112–1125.
Journal Article
Deprotonation of Fe-dominant amphiboles: Single-crystal HT-FTIR spectroscopic studies of synthetic potassic-ferro-richterite
Giancarlo Della Ventura, Umberto Susta, Fabio Bellatreccia, Augusto Marcelli, Günther J. Redhammer, Roberta Oberti
Publisher: Mineralogical Society of America
Published: 01 January 2017
American Mineralogist (2017) 102 (1): 117–125.
Journal Article
Use of multivariate analysis for synchrotron micro-XANES analysis of iron valence state in amphiboles
M. Darby Dyar, Elly A. Breves, Mickey E. Gunter, Antonio Lanzirotti, Jonathan M. Tucker, C.J. Carey, Samantha E. Peel, Elizabeth B. Brown, Roberta Oberti, Mirna Lerotic, Jeremy S. Delaney
Publisher: Mineralogical Society of America
Published: 01 May 2016
American Mineralogist (2016) 101 (5): 1171–1189.
Journal Article
Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite
Publisher: Mineralogical Society of America
Published: 01 April 2015
American Mineralogist (2015) 100 (4): 909–914.
Includes: Supplemental Content
Journal Article
Synthesis and characterization of amphiboles along the tremolite–glaucophane join
Publisher: Mineralogical Society of America
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 588–600.
Includes: Supplemental Content
Journal Article
Nomenclature of the amphibole supergroup
Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacher, Mark D. Welch
Publisher: Mineralogical Society of America
Published: 01 November 2012
American Mineralogist (2012) 97 (11-12): 2031–2048.
Journal Article
The crystal chemistry of Li in gadolinite
Publisher: Mineralogical Society of America
Published: 01 July 2008
American Mineralogist (2008) 93 (7): 996–1004.
Includes: Supplemental Content
Journal Article
Magnesium K -edge EXAFS study of bond-length behavior in synthetic pyrope-grossular garnet solid solutions
Simona Quartieri, Federico Boscherini, Chiara Dalconi, Gianluca Iezzi, Carlo Meneghini, Roberta Oberti
Publisher: Mineralogical Society of America
Published: 01 February 2008
American Mineralogist (2008) 93 (2-3): 495–498.
Journal Article
Scandium-45 NMR of pyrope-grossular garnets: Resolution of multiple scandium sites and comparison with X-ray diffraction and X-ray absorption spectroscopy
Publisher: Mineralogical Society of America
Published: 01 November 2007
American Mineralogist (2007) 92 (11-12): 1875–1880.
Journal Article
FTIR spectroscopy of Ti-rich pargasites from Lherz and the detection of O 2− at the anionic O3 site in amphiboles
Publisher: Mineralogical Society of America
Published: 01 October 2007
American Mineralogist (2007) 92 (10): 1645–1651.
Journal Article
Aluminotaramite, alumino-magnesiotaramite, and fluoro-alumino-magnesiotaramite: Mineral data and crystal chemistry
Publisher: Mineralogical Society of America
Published: 01 August 2007
American Mineralogist (2007) 92 (8-9): 1428–1435.
Journal Article
Site preference and local geometry of Sc in garnets: Part I. Multifarious mechanisms in the pyrope-grossular join
Roberta Oberti, Simona Quartieri, Maria Chiara Dalconi, Federico Boscherini, Gianluca Iezzi, Massimo Boiocchi, Sigrid Griet Eeckhout
Publisher: Mineralogical Society of America
Published: 01 August 2006
American Mineralogist (2006) 91 (8-9): 1230–1239.
Journal Article
Site preference and local geometry of Sc in garnets: Part II. The crystal-chemistry of octahedral Sc in the andradite–Ca 3 Sc 2 Si 3 O 12 join
Simona Quartieri, Roberta Oberti, Massimo Boiocchi, Maria Chiara Dalconi, Federico Boscherini, Olga Safonova, Alan B. Woodland
Publisher: Mineralogical Society of America
Published: 01 August 2006
American Mineralogist (2006) 91 (8-9): 1240–1248.
Journal Article
The arrojadite enigma: I. A new formula and a new model for the arrojadite structure
Publisher: Mineralogical Society of America
Published: 01 August 2006
American Mineralogist (2006) 91 (8-9): 1249–1259.
Journal Article
The arrojadite enigma: II. Compositional space, new members, and nomenclature of the group
Publisher: Mineralogical Society of America
Published: 01 August 2006
American Mineralogist (2006) 91 (8-9): 1260–1270.
Journal Article
Parvo-mangano-edenite, parvo-manganotremolite, and the solid solution between Ca and Mn 2+ at the M4 site in amphiboles
Publisher: Mineralogical Society of America
Published: 01 April 2006
American Mineralogist (2006) 91 (4): 526–532.
Includes: Supplemental Content