Strontiumselenid

BeschreibungStrontium selenide has the molecular formula of SrSe and the molecular weight of 166.5852 g/mol. It is a white cubic crystal whose CAS number is 1315-07-7. Its melting point is 1605°C and its density is 4.54 g/cm3. It reacts with water and so cannot be prepared by an aqueous precipitation method. It can be prepared by the reaction of the oxide with Se metal: 2SrO+ Se+ Heat SrSe+ SeO2 It can also be prepared by reducing the selenate with hydrogen gas: SrSeO4 + 4H2 + heat SrSe+ 4H2O Strontium selenide and barium selenide both have a simple cubic structure, with cube edges equal to 3.117 and 3.308 , respectively. In the case of SrSe, the ions at the corners are Sr++ and Se--。

VerwendenThe major usage of SrSe has been as an infrared stimulable phosphor. Photoluminescent materials useful for detection of infrared light are prepared using a base material, such as SrSe. Up to three dopants, Sm3+, cerium, Ce3+ and Eu2+ compounds are used for the purpose of providing electron traps. The base material can be a combination of alkaline earth metal selenides such as strontium selenide, calcium selenide, or a mixture of these. Luminescence is a long known phenomenon of nature reaching back very far in history. Recorded observations reach back to the last century. Seeback and Becquerel observed momentary visible afterglow in certain materials.