pharmacosiderite

The earliest published record of pharmacosiderite at Tsumeb is that of Geier et al. (1971) who recognised the mineral as a very minor component of the type assemblage for tsumcorite. In a "cavernous" part of the ore body at E49 on 30 Level a complex paragenesis was observed including anglesite, beudantite, carminite, arseniosiderite, beaverite, scorodite, pharmacosiderite and tsumcorite.

Bartelke (1976; citing unpublished TCL reports and a 1976 pers. comm. from Walter Kahn) noted that small, translucent, admantine, yellow to olive-green crystals of pharmacosiderite were found on 30 Level, information repeated by Pinch and Wilson (1977), Keller (1984) and Gebhard (1999).

Keller and Innes (1986) recorded an occurrence of pharmacosiderite from the West 40 Stope on 32 Level where they also found paradamite, betpakdalite, pharmacosiderite and ojuelaite.