fluorspar 1999 28 1 f luorsp ar by m michael miller domestic survey data and tables were prepared cindy chen statistical assistant the world production table was regina r coleman international coordinator traditionally has been considered to be vital nation s national security economy it is used directly or indirectly manufacture such products as aluminum gasoline insulating foams refrigerants steel uranium fuel most consumption trade involve either acid grade which greater than 97 calcium fluoride caf 2 subacid less latter includes metallurgical ceramic grades commonly called all sources of are derived from sales material defense stockpile nds a small amount synthetic produced industrial waste streams byproduct fluorosilicic some phosphoric producers supplements source fluorine but not included in calculations according us census bureau geological usgs imports decreased 5 compared with those 1998 hydrofluoric hf 3
