Crystalline ZnMgSe:Cr2+: a new material for active elements of tunable   IR-lasers
  Obtained is a new thermostable material for active elements of tunable IR-lasers - Zn1-xMgxSe:Cr2+ single crystals. The position of the absorption band of Cr2+ ions in wurtzite-type Zn0.8Mg0.2Se matrix is established. 
Yu. A. Zagoruiko, N. O. Kovalenko, O. A. Fedorenko, V. A. Khristyan