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abrasive alumina aluminium asbestos Australia bagged barytes bauxite bentonite borates borax bulk Cables calcined Canada Canadian capacity carbonate ceramic cerium China Clays company's concentrate consumption countries crude demand deposits diatomite Europe ex-works expansion exports feldspar fertiliser filler filter-aids Finland fluorspar foundry France glass grain graphite grinding gypsum ilmenite important increase India industrial minerals iron Japan kaolin Kyanite largest limestone Limited lithium London lump magnesite major manufacture mesh Metal metric tons mica micronised mill mineral sands mining monazite North Norway operations output oxide P.O. Box perlite phosphate phosphate rock pigment plant potash processing production rare earth rates raw materials recently refractory grade rutile salt silica silica sand Sillimanite soda ash sodium sulphate South Africa Spain steel strontium subsidiary sulphuric acid supply Sweden talc Telephone Telex tion titanium tonnage Total trade USSR West Germany zircon