Thorogood, Gordon J., Kennedy, Brendan J., Griffith, Christopher S., Elcombe, Maragaret M., Avdeev, Maxim, Hanna, John V., Thorogood, Samantha K. and Luca, Vittorio. (2010) Structure and phase transformations in the titanosilicate, sitinakite. The importance of water. Chemistry of Materials, Vol.22 (No.14). pp. 4222-4231. ISSN 0897-4756

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Abstract

Synchrotron X-ray diffraction and neutron diffraction have been used to investigate the phase changes that the titanosilicate mineral sitinakite undergoes when dehydrated. Refinements of the powder diffraction data of the material before and after heating to 573K indicate a phase change from space group P4(2)/mcm to P4(2)/mbc. Upon exposure to normal atmospheric conditions for an extended period the material transforms back to P4(2)/mcm with a reduced lattice parameter. If the material is heated in a sealed capillary, it is possible to get the two phases coexisting. The coexistence of these two phases in sealed system suggests that it is only the loss of H2O that is driving the reversible phase transformation.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Chemistry of Materials
Publisher:	American Chemical Society
ISSN:	0897-4756
Date:	27 July 2010
Volume:	Vol.22
Number:	No.14
Number of Pages:	10
Page Range:	pp. 4222-4231
Identification Number:	10.1021/cm100727h
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Australian Synchrotron Research Program, Commonwealth of Australia
URI:	http://wrap.warwick.ac.uk/id/eprint/5554

Data sourced from Thomson Reuters' Web of Knowledge

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