Indium antimonide - Wikipedia
https://en.wikipedia.org/wiki/Indium_antimonideInSb has the appearance of dark-grey silvery metal pieces or powder with vitreous lustre. When subjected to temperatures over 500 °C, it melts and decomposes, liberating antimony and antimony oxide vapors. The crystal structure is zincblende with a 0.648 nm lattice constant. InSb is a narrow-gap semiconductor with an energy band gap of 0.17 eV at 300 Kand 0.23 eV at 8…