Investigation of Virgin Coals and Coals Subjected to a Mild Acid Treatment

A quantitative determination of the relative marcasite/pyrite contents in virgin coals is possible by means of 57 Fe Mössbauer spectroscopy. Complications arise, however, when iron-containing silicates, carbonates, or other salts are present. The application of a mild chemical treatment involving hydrofluoric acid has been employed to remove these Fe-containing phases while leaving the iron-disulfide phases unaffected.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42925/1/10751_2004_Article_331047.pd