Argutite
A rare germanium dioxide in the rutile group, first described from the Argut deposit in the French Pyrenees in 1983.
Intro adapted from Wikipedia (CC BY-SA).
Argutite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula GeO₂.
It crystallizes in the tetragonal crystal system (space group P4_2/mnm). It is a member of the Rutile structural group.
Key properties: Mohs hardness 6–7; specific gravity 6.28; refractive index 2.01; optically uniaxial.
IMA symbol Agt, IMA status: approved, named in 1980.
Found in a zinc deposit formed in metamorphosed lower Paleozoic sediments.
It is found associated with Sphalerite, cassiterite, siderite, briartite.
The name refers to the occurrence in the Argut deposit, France.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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