Dipartimento di Scienze della Terra

Descrizione del progetto

Structural Changes and Phase Transitions in feldspars

The researches concern experimental studies on the phase transitions, the structural changes and the order/disorder phenomena in feldspars, as a function of temperature and pressure. These studies involve structural studies on thermally treated feldspars and investigations on phase transitions and on Al-Si ordering at different T and P. The investigations are carried out in situ at HT and HP, by means of modern technologies, which allow to reproduce in laboratory the conditions present in the Earth's mantle and then to define the transformations in minerals occurring in these extreme conditions. The crystal structures are studied directly at HP, in a range between 0 and 10 GPa, using diamond anvil cell (DAC).

The investigations are carried out on alkali feldspar (analbite, anorthoclase), on alkaline-earth feldspars (Ca-, Ba-, Sr- feldspar) and on lead feldspar, and they are of particular interest both in mineralogical and in ceramic field. Because these studies should lead to a better definition of the Equations of State (EoS), they are of particular importance for petrology. In fact, these researches allow obtaining a more accurate definition of the experimental changes induced by variations in T and P, and they allow to characterize the structural and thermodynamic behaviour of feldspars.

Risultati e pubblicazioni

Research Products

Curetti N, Benna P, Bruno E (2017) High-pressure structural configuration and phase transition in celsian, BaAl₂Si₂O₈. Physics and Chemistry of Minerals, 44:181-192. doi: 10.1007/s00269-016-0847-0

Curetti N, Benna P, Bruno E (2015) High-pressure equation of state and phase transition in PbAl₂Si₂O₈ feldspar. American Mineralogist, 100:1568-1577. doi: 10.2138/am-2015-5000.

Curetti N, Benna P, Bruno E (2015) Compressibility and high-pressure behaviour of lead feldspar. Associazione Italiana di Cristallografia, XLIV Annual Meeting, Abstracst  130, Vercelli

Bertolotti F, Curetti N, Benna P, Gervasio G (2013) The effects of P-T changes on intermolecular interactions in crystal structure of iodoform. Journal of Molecular Structure, 1041:106-112. DOI 0.1016/j.molstruc.2013.03.002

Curetti N, Benna P, Ivaldi G, Nestola F, Bruno E (2012) High-pressure phase transition in lead feldspar (PbAl₂Si₂O₈). AIC, XLI CN, Abstracst 130, Verona

Bertolotti F, Curetti N, Benna P, Gervasio G (2012)The effects of P-T changes on intermolecular interactions in iodoform crystal structure. Associazione Italiana di Cristallografia, XLI Congresso Nazionale, Abstracst 111, Verona

Gatta GD, Merlini M, Rotiroti N, Curetti N, Pavese A (2011) On the crystal chemistry and elastic behavior of a phlogopite 3T. Physics and Chemistry of Minerals, 38:655-664. DOI 10.1007/s00269-011-0438-z

Benna P, Curetti N, Nestola F, Bruno E (2011) High-pressure phase transitions in alkaline-earth feldspars. VIII FIST 4, 212-213, Torino

Curetti N, Benna P, Nestola F, Bruno E (2011) High-pressure structural configurations of celsian. VIII FIST 4, 213, Torino

Curetti N, Sochalski-Kolbus L, Angel RJ, Benna P, Nestola F, Bruno E (2011) High-pressure structural evolution and equation of state of analbite. American Mineralogist, 96:383-392. DOI 10.2138/am.2011.3604

Projects

Structural Changes and Phase Transitions induced by pressure and temperature in feldspars

Dalle materie prime del sistema Terra alle applicazioni tecnologiche: studi cristallochimici e strutturali (PRIN 2010/2011)