Isotopically pure ZnSe crystals grown from the vapor

Abstract For the study of isotope effects in ZnSe, 64 Zn and 68 Zn isotopes have been combined with 76 Se and 80 Se isotopes. Synthesis, purification and crystal growth were carried out via the vapor phase in the same sealed ampoule. The 〈1 1 1〉 directed growth was favored by repeated formation of twins. Rod-shaped crystals up to 8 mm in length were obtained from small quantities of source materials. The physical vapor transport in an argon atmosphere with a Zn reservoir has been studied quantitatively.