Intrinsic point defect equilibria in this material were calculated. The results indicated that discrepancies in published data were due to the presence of interstitial Zn that existed in various charge states.

N.K.Morozova: Izvestiya Akademii Nauk SSSR - Neorganicheskie Materialy, 1991, 27[7], 1375-80. (Inorganic Materials, 1991, 27[7], 1161-61)