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Title: Structure and phase transformations in the titanosilicate, sitinakite. The importance of water
Authors: Thorogood, GJ
Kennedy, BJ
Griffith, CS
Elcombe, MM
Avdeev, M
Hanna, JV
Thorogood, SK
Luca, V
Keywords: Phase transformations
X-ray diffraction
Neutron diffraction
Issue Date: 27-Jul-2010
Publisher: American Chemical Society
Citation: Thorogood, G. J., Kennedy, B. J., Griffith, C. S., Elcombe, M. M., Avdeev, M., Hanna, J. V., Thorogood, S. K., & Luca, V. (2010). Structure and phase transformations in the titanosilicate, sitinakite. The importance of water. Chemistry of Materials, 22(14), 4222-4231. doi:10.1021/cm100727h
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 P42/mcm to P42/mbc. Upon exposure to normal atmospheric conditions for an extended period the material transforms back to P42/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. © 2010, American Chemical Society
Gov't Doc #: 2121
ISSN: 0897-4756
Appears in Collections:Journal Articles

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