Mineral Species
Pseudomalachite
Type Locality
No
Composition
Cu2+5(PO4)2(OH)4
Crystal System
Monoclinic
Status at Tsumeb
Believed valid
Abundance
Extremely rare
Distribution
Second oxidation zone
Paragenesis
Supergene
Entry Number
Species; TSNB289
General Notes
Pseudomalachite was identified by Schlüter et al. (2011) as a component of the type specimen for hermannroseite. It occurs with manganese oxides, conichalcite and whitlockite lining a vug in hydroxylapatite. These minerals form a botryoidal crust with conichalcite enclosing alternating microcrystalline sequences of conichalcite, hermannroseite, hydroxylapatite, pseudomalachite and whitlockite. The hermannroseite type specimen was recovered from the East 49 Stope on 28 Level, probably in 1967, by TCL mineralogist Bruno Geier (#16862).
A small fragment from the hermannroseite type specimen is in the Feinglos Collection at Harvard University (MGMH 2022.4.10393T). Feinglos’ data card reads: "part of holotype from author (GG) [= Georg Gebhard] collected by B. Geier, 11-20-1967".
Associated Minerals
conichalcite; hermannroseite; hydroxylapatite; whitlockite
