Phyllosilicate (sheet silicate), allophane group
Specific gravity: 2.7
Hardness: 2 to 3
Colour: Yellowish white, light brownish yellow, blue, green, brown
Imogolite occurs principally in soils derived from volcanic ash. It has been found associated with
quartz. Imogolite has been observed in cracks in
At the type locality, Uemura, Kumamoto, Japan, imogolite occurs as a decomposition product of volcanic ash in soils in a humid environment (Mindat).
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