Hamad Alarji
School of Mineral and Energy Resources, University of New South Wales, Sydney, NSW 2052, Australia;
Australia

Stuart Clark
School of Mineral and Energy Resources, University of New South Wales, Sydney, NSW 2052, Australia;
Australia

Klaus Regenauer-Lieb
School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia;
Australia