 Antimony is being increasingly used in the <unk> industry as a <unk> for heavily doped n @-@ type silicon <unk> in the production of diodes , infrared detectors , and Hall @-@ effect devices . In the 1950s , tiny beads of a lead @-@ antimony alloy were used to <unk> the <unk> and collectors of n @-@ p @-@ n alloy junction <unk> with antimony . <unk> antimonide is used as a material for mid @-@ infrared detectors . 
