Title
agardite-(y)
Composition
(Y,Ca)Cu2+6(AsO4)3(OH)6∙3H2O
Crystal System
Hexagonal
Status at Tsumeb
Doubtful
Type Locality
No
Entry Type
Species TSNB5
General Notes
In describing agardite from Tsumeb, Key (1996) noted the composition as "calcium yttrium copper arsenate hydroxide hydrate", and "agardite-(Y)" from Tsumeb was listed by Gebhard (1999). However, both these references pre-date the formal description of agardite-(Ce) (Walenta and Theye 2004).
Gebhard’s (1999) tabulation of Tsumeb minerals includes "agardite-(Y)", despite his assertion that Tsumeb agardite is cerium-bearing and his prediction that further work would eventually lead to the description of agardite-(Ce) as a new mineral.
The implication that agardite-(Y) sensu stricto occurs at Tsumeb is almost certainly unintentional. For these reasons the occurrence of agardite-(Y) at Tsumeb is considered doubtful.
Associated Minerals
Undetermined