Is selenium a good conductor of heat?
No, selenium is not a good thermal conductor.
Thermal conductors are rated by W/cmK. Without going into the explanation, a higher number represents a better conductor, and 0.0 means no conductivity at all. Selenium is rated at 0.0204 W/cmK. By comparison, copper, which is an excellent conductor, is rated at 4.01 W/cmK.