1. Centre for Acid Sulfate Soil Research, Southern Cross GeoScience, Southern Cross University, Lismore, NSW 2480, Australia, Monash Centre for Synchrotron Science and School of Chemistry, Monash University, Clayton, VIC 3800, Australia, CSIRO Land and Water, Waite Rd., Urrbrae, SA 5064, Australia, Institute of Materials and Engineering Science, Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia, and National Synchrotron Radiation Research Centre, 101 Hsin-Ann Road, Hsinchu...