Title
niedermayrite
Composition
Cu4Cd(SO4)2(OH)4 H2O
Crystal System
Monoclinic
Status at Tsumeb
Believed valid
Abundance
Extremely rare
Distribution
Undetermined.
Paragenesis
Supergene.
Type Locality
No
Entry Type
Species TSNB255
General Notes
The occurrence of niedermayrite at Tsumeb was reported by Joy Désor in April 2020, based on analysis by SEM-EDS and Raman spectroscopy (Joy Désor - New minerals for the Tsumeb mine, Namibia (mindat.org); accessed October 2022).
Niedermayrite is one of several cadmium-bearing minerals discovered by Désor in a large specimen of germanite ore (with chalcocite, galena and sphalerite) containing vugs hosting cerussite, galloplumbogummite and pyromorphite. The paragenesis also includes edwardsite, lauraniite, lazaridisite and otavite.
Niedermayrite occurs as tabular greenish-blue crystals and aggregates with individual crystals to c. 50 μm.
