Riesite
Riesite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula TiO₂.
It crystallizes in the monoclinic crystal system (space group P2/c). It is a member of the Columbite structural group.
Key properties: specific gravity 4.37.
IMA symbol Rie, IMA status: approved, named in 2017.
Occurs as complete or partial replacement of rutile clasts trapped in a shock-melt vein in a xenolith of garnet-sillimanite in suevite. Riesite forms by transformation from akaogiite upon release from the shock state.
It is found associated with Majorite-rich garnet, stishovite, jadeite-rich clinopyroxene, akaogiite.
The name is taken from the type locality.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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