Images
Formula: PbZn2(AsO4)2(H2O,OH)2
Arsenate,
tsumcorite group
Crystal System: Triclinic
Specific gravity: 5.30 calculated
Hardness: 4½
Streak: Yellow
Colour: Greenish yellow
Environments
To date (March 2020) zincgartrellite has been found only at the type locality, the Tsumeb Mine, Oshikoto
Region, Namibia.
It is a rare supergene
arsenic-bearing mineral occurring
in an oxidised zone of a dolostone-hosted hydrothermal
polymetallic ore deposit (HOM). It has been found on massive
chalcocite associated with
wulfenite and duftite
(Webmin). Other associated minerals include tsumcorite,
stranskiite, leiteite,
quartz and tennantite
(HOM). It has also been found as as encrustations of crystals less than 0.1 mm in size, associated with
zincolivenite and quartz,
on silicified, mineralised dolostone
(Tsumeb).
Back to Minerals