Tin telluride wavelength range. The alloyed material has been used in mid- IR photodetectors and thermoelectric generator. Tin telluride Tin telluride is a compound of tin and tellurium (SnTe); is a IV-VI narrow band gap semiconductor and has direct band gap of 0.18 eV. It is often alloyed with lead to make lead tin telluride, which is used as an infrared detector material. Tin telluride normally forms p-type semiconductor (Extrinsic semiconductor) due to tin vacancies and is a low temperature superconductor. SnTe exists in 3 crystal phases. At Low temperatures, where the concentration of hole carriers is less than 1.5x10 cm ,
Marriage and wedding customs in the Philippines the coin bearer acts as the holder and keeper of the arrhae until it is offered and given by the groom to his bride. Among the secondary sponsors or wedding attendants, three pairs – each pair consists of a male and a female secondary sponsor – are chosen to light the wedding candles, handle the veils, and place the cord. After the exchange of wedding rings by the couple, the groom gives the wedding arrhae to his bride. The arrhae is a symbol of his "monetary gift" to the bride because it is composed of 13 pieces of gold, or