Goudeyite

Goudeyite was reported by Gebhard (1993) as "… yellow-green sprays to 1 cm in cavities. Twenty to thirty specimens have been recovered, and probably represent the best for the species. This is also the first known occurrence of a rare-earth mineral at Tsumeb."

Almost certainly, this was a mis-identification of agardite-Ce. Notably, goudeyite is not included in Gebhard’s (1999) list of species occurring at Tsumeb, but his (1993) description of goudeyite closely matches his (1999) description of agardite.