Mineral Species
Ktenasite
Type Locality
No
Composition
(Cu2+,Zn)5(SO4)2(OH)6·6H2O
Crystal System
Monoclinic
Status at Tsumeb
Believed valid
Abundance
Extremely rare
Distribution
Undetermined
Paragenesis
Supergene
Entry Number
Species; TSNB198
General Notes
Ktenasite is a member of the devilline group of minerals and is closely related to devilline and serpierite, both of which also occur at Tsumeb.
The occurrence of ktenasite at Tsumeb was reported by Joy Désor in April 2020, based on analysis by SEM-EDS and Raman spectroscopy (www.mindat.org/locentry-1365433.html; accessed April 2020).
Ktenasite was found in close association with niedermayrite in a paragenesis of secondary cadmium-bearing minerals discovered by Désor in a large specimen of germanite ore (with chalcocite, galena and sphalerite) containing vugs also hosting cerussite, galloplumbogummite and pyromorphite.
Associated Minerals
cerussite; chalcocite; chlorargyrite; edwardsite; galena; galloplumbogummite; germanite; gunningite; lauraniite; lazaridisite; niedermayrite; otavite; pyromorphite; schulenbergite; sphalerite
