title: Strontium selenide
text: # Strontium selenide
  
  Strontium selenide is an inorganic compound with the chemical formula SrSe.
  
  ## Preparation
  
  Strontium selenide can be prepared by reducing strontium selenate with hydrogen at 600 °C. It can also be produced by reacting strontium and hydrogen selenide in liquid ammonia.
  
  ## Properties
  
  Strontium selenide crystallizes in the orthorhombic crystal system with space group Fm3m. It has a NaCl structure. It transforms into a CsCl structure with a space group Pm3m under high pressure (14 GPa).
  
  It reacts with mercury selenide and germanium diselenide at high temperature to obtain the $SrHgGeSe_4$ crystal. It reacts with thorium and selenium at high temperature in the presence of tin to obtain $SrTh_2Se_5.$
  
  