INORGANIC CHEMICALS--NAMELY, METAL SALTS IN CRYSTALLINE FORM, AND METAL BORIDES, METAL CARBIDES, METAL NITRIDES, METAL OXIDES, METAL PHOSPHIDES, METAL SILICIDES, METAL SULPHIDES, INTERMETALLIC COMPOUNDS ALL IN FINELY DIVIDED BULK FORM AND/OR IN SINTERED SHAPES AND PARTS INCLUDING TUBES, RODS, BARS, PELLETS AND STRUCTURES OF VARYING SHAPE MADE TO CUSTOMER SPECIFICATION