Imogolite
A nanotube-forming aluminium-silicate clay of volcanic-ash soils, first described in 1962 in Kumamoto, Japan.
Intro adapted from Wikipedia (CC BY-SA).
Imogolite is an IMA-recognized mineral species in the silicate class, with the chemical formula Al₂SiO₃(OH)₄.
It is a member of the Allophane structural group.
Key properties: Mohs hardness 2–3; specific gravity 2.7; Vitreous, resinous, waxy luster.
IMA symbol Imo, IMA status: approved, named in 1962.
Found in soils derived from volcanic ash.
It is found associated with Allophane, quartz, cristobalite, gibbsite, vermiculite, \limonite".
The name refers to the name, Imogo, of the brownish yellow volcanic ash soil of Japan in which it occurs.
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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