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Resource: used or used up in processes

Silicon

Appears in 2 processs and 4 steps. Everything below is linked: open a process to see it in context.

Top processes

Volcanic ash weathering to allophane and imogolite (andic soils)

3 steps

Glass hydrolyses within centuries in humid, well-drained conditions, releasing Al3+ and Si(OH)4
Al and Si co-precipitate as allophane spherules (about 3.5 to 5 nm) and imogolite tubes (about 2 nm outer diameter)
With drying and Si accumulation allophane converts slowly to halloysite over thousands of years

Mineral weathering and parent material

1 step

Volcanic ash weathering to allophane and imogolite (andic soils)

Often found with

Water 4 Allophane 3 Aluminum 3 Volcanic ash 2 Imogolite 2 Volcanic glass 2 Soil water 1 Halloysite 1 Allophane 1

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