__all__ = [
           'Semiconductor','Si','Ge','SiC','AlN','AlP','AlAs','AlSb','BN','GaN','GaP',
           'GaAs','GaSb','InN','InP','InAs','InSb','ZnO','ZnS','ZnSe','ZnTe','CdS',
           'CdSe','CdTe','HgS','PbS','PbSe','PbTe','SiGe','AlGaAs','AlGaN','AlGaSb',
           'CdMnTe','GaAsP','HgCdTe','InAlAs','InGaAs','InGaN','AlGaAsSb','GaInAsP'
           ]