Further information Description Crystalline tellurium has a silvery-white appearance, and exhibits a metallic lustre when pure. It is brittle and easily pulverised.
Tellurium is a p-type semiconductor, and shows varying conductivity with crystal alignment.
Its conductivity increases slightly with exposure to light. It can be doped with silver, copper, gold, tin, or other elements. Both values are quoted on the Pauling scale. For most elements, the most stable allotrope is illustrated. This section gives some data for naturally occurring isotopes.