Aluminophosphate are objects of a growing research interest due to their potential technologieal and industriaI applications [e.g 1,2]. Their large channels serve as ideaI host for organie compounds and small polymers. Among those, AIP0-5 is a synthetic zeolite characterized by an open-framework of (P,AI)O4 tetrahedra. The tetrahedra are connected to form six-and twelve-membered rings, in such a way that a large channel (0~7.3À), parallel to the  direction, occurs. Klap et al.  underlines that every crystal of AIP0-5 is built up by three different microdomains, in which the positions of the framework oxygen atoms are slightly different; the main effect of the structural disorder is the very large anisotropie displacement parameters of the framework oxygens. We performed two in situ single-crystal synchrotron X-ray diffraction experiments using both penetrating (methanol:ethanol:H20 mix, m:e:w) and non-penetrating (silicon oil) pressure media . The structure refinements showed that: 1) for compression in m:e:w mix, H20 molecules are absorbed at low-P regime, forming a H20-network by H-bonding interaction; 2) the elastic parameters of the super-hydrated AIP04 5 are different if compared to the one compressed in silicon oil; 3) the structural deformation mechanisms of super-hydrated and regular AIP04 -5 are different; 4) evidence of a incommensurately modulated structure occur (according to ), and there is an evolution of the non-Bragg reflections with pressure. The author acknowledges the ltalian Ministry of Education, MIUR-Project: "Futuro in Ricerca 2012 -ImPACT-RBFR12CLQD". [lJ Tang Z.K. et al. Applied Physies Letters 1998; 73, 2287-2289.  Yang W.S. et al. Microporous and mesoporous materials 20i6; 219,87-92. [3J Klap G.J. et al. Mieroporous and mesoporous materials 2000; 38,403-412. [4J Gatta, G.D. Mieroporous and Mesoporous Material 2010; 128, 78-84.
High pressure behaviour of AIP04-5 in penetrating/ non penetrating pressure medium / D. Comboni, P. Lotti, G.D. Gatta, L. Pastero. ((Intervento presentato al 49. convegno High-pressure crystallography: status artis and emerging opportunities tenutosi a Erice nel 2016.
|Titolo:||High pressure behaviour of AIP04-5 in penetrating/ non penetrating pressure medium|
COMBONI, DAVIDE (Primo)
LOTTI, PAOLO (Secondo)
GATTA, GIACOMO DIEGO (Penultimo)
|Data di pubblicazione:||mag-2016|
|Parole Chiave:||zeolites; AIPO4 -5; high pressure|
|Settore Scientifico Disciplinare:||Settore GEO/09 - Georisorse Miner.Appl.Mineral.-Petrogr.per l'amb.e i Beni Cul|
|Citazione:||High pressure behaviour of AIP04-5 in penetrating/ non penetrating pressure medium / D. Comboni, P. Lotti, G.D. Gatta, L. Pastero. ((Intervento presentato al 49. convegno High-pressure crystallography: status artis and emerging opportunities tenutosi a Erice nel 2016.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|