Originally described as a new mineral, but later shown to be a cobalt-rich variety of malanite.
References for Dayingite
Reference List:
American Mineralogist 61, 185 (1976)
Yu Zuxiang (1981): A restudy of malanite and cobalt-malanite (dayingite). Geological Review 27, 55–71 (in Chinese with English abstract). - American Mineralogist 67 (1982), 1081 (abstract).