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A thermosyphon-driven hydrothermal flow-through cell for in situ and time-resolved neutron diffraction studies

Xia, Fang and O’Neill, Brian and Ngothai, Yung and Peak, Jason and Tenailleau, Christophe and Etschmann, Barbara and Qian, Gujie and Brugger, Joël and Studer, Andrew and Olsen, Scott and Pring, Allan A thermosyphon-driven hydrothermal flow-through cell for in situ and time-resolved neutron diffraction studies. (2010) Journal Of Applied Crystallography, vol.43 (3). pp. 511-519. ISSN 0021-8898

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Official URL: http://dx.doi.org/10.1107/S0021889810006990

Abstract

A flow-through cell for hydrothermal phase transformation studies by in situ and time-resolved neutron diffraction has been designed and constructed. The cell has a large internal volume of 320 ml and can operate at temperatures up to 573 K under autogenous vapor pressures (ca 8.5 106 Pa). The fluid flow is driven by a thermosyphon, which is achieved by the proper design of temperature difference around the closed loop. The main body of the cell is made of stainless steel (316 type), but the sample compartment is constructed from non-scattering Ti–Zr alloy. The cell has been successfully commissioned on Australia’s new high-intensity powder diffractometer WOMBAT at the Australian Nuclear Science and Technology Organization, using two simple phase transformation reactions from KAlSi2O6 (leucite) to NaAlSi2O6H2O (analcime) and then back from NaAlSi2O6H2O to KAlSi2O6 as examples. The demonstration proved that the cell is an excellent tool for probing hydrothermal crystallization. By collecting diffraction data every 5 min, it was clearly seen that KAlSi2O6 was progressively transformed to NaAlSi2O6H2O in a sodium chloride solution, and the produced NaAlSi2O6H2O was progressively transformed back to KAlSi2O6 in a potassium carbonate solution.

Item Type:Article
Additional Information:Thanks to International Union of Crystallography editor. The definitive version is available at www.iucr.org/ The original PDF of the article can be found at Journal Of Applied Crystallography website : http://scripts.iucr.org/cgi-bin/paper?ks5244
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > University of Adelaïde (AUSTRALIA)
Other partners > Australian Nuclear Science and Technology Organisation - ANSTO (AUSTRALIA)
Other partners > South Australian Museum (AUSTRALIA)
Other partners > University of South Australia (AUSTRALIA)
Laboratory name:
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Deposited By:Nihad Lahdifi

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