Tin telluride 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 , Tin Telluride exists in rhombohedral phase also known as α-SnTe. At room temperature and atmospheric
Wedding customs by country weddings in the United States follow a similar pattern to an English wedding. It traditionally follows the "white wedding" type (see also "Wedding types" below), which originates from the white color of the bride's wedding dress, but refers to an entire wedding routine. Customs and traditions vary, but common components are listed below. The purpose of inviting guests is to have them witness a couple's marriage ceremony and vows and to share in their joy and celebration. Gifts for the wedding couple are optional, although most guests attempt to give at least a token gift of their best wishes. Some