We would like to acknowledge Timothy Sharp, John Allen, and Mark Tindale for their assistance with laboratory analysis and preparation of XRD samples. Maree Anast contributed greatly to the acquisition and interpretation of the XRD data, and, particularly, aided with the use of SIROQUANT. Rick Wuhrer collected the SEM images. The manuscript has benefited from the input of Adrian Cramp and Cristino Dabrio. The work was supported by UTS internal research grant no. 0681r.