Mineral Species
Phlogopite
Type Locality
No
Composition
KMg3AlSi3O10(OH)2
Crystal System
Monoclinic
Status at Tsumeb
Believed valid
Abundance
Very rare
Distribution
First and second oxidation zones
Paragenesis
Supergene
Entry Number
Species; TSNB276
General Notes
Keller and Bartelke (1982; citing a pers. comm. from Olaf Medenbach) stated that phlogopite occurs as a low temperature secondary mineral in association with wulfenite. Similarly, Gebhard (1999) noted the occurrence of small white aggregates of phlogopite (to 1 mm) on azurite crystals.
Keller (1984) noted that kaolinite and montmorillonite also occur as low temperature secondary minerals in this manner.
Fraipontite has a similar habit and mode of occurrence.
Lombaard et al. (1986) listed phlogopite as a "very rare" mineral at Tsumeb.
Associated Minerals
azurite; wulfenite
