White-lemon microcrystals of the extremely rare Ta-Nb mineral kimrobinsonite from the type locality in Western Australia and only one of the two known localities worldwide (Forrestania Gold Project, Mount Holland, Forrestania, Yilgarn Shire, Western Australia, Australia). Analyzed specimen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Kimrobinsonite
Kimrobinsonite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Ta(OH)₃(O,CO₃).
It crystallizes in the cubic crystal system.
Key properties: specific gravity 6.865; White streak; Dull chalky luster.
IMA symbol Kim, IMA status: approved, named in 1983.
The weathering product of an undetermined Ta–Sb pegmatite mineral.
It is found associated with Cesstibtantite, manganotantalite, antimonian microlite.
The mineral was named to honor Kim Robinson (1951–), Australian geologist of Perth, Australia, who discovered the specimen in which the mineral occurs.