Inorganic geochemistry of coal / Shifeng Dai (College of Geoscience and Survey Engineering, China University of Mining and Technology, Beijing, China), Robert B. Finkelman (Geosciences Department, University of Texas, Dallas Richardson, TX, United States), James C. Hower (University of Kentucky Center for Applied Energy Research, Lexington, KY, United States), David French (Earth and Sustainability Sciences Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia), Ian T. Graham (Earth and Sustainability Sciences Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia), Lei Zhao (College of Geoscience and Survey Engineering, China University of Mining and Technology, Beijing, China)