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Earth and Space Sciences · 术语表

什么是 Bisiallitisation, monosiallitisation, allitisation？

又称： bisiallitisation · monosiallitisation · allitisation

Definition 19.6 University Earth and Space Sciences — Year 1 · 第 19 章 — Weathering and Clays

The degree of the hydrolysis of silicates is named after its product. Bisiallitisation forms 2:1 clay minerals, such as smectites, with about two silicon atoms per aluminium; part of the cations stays in them. Monosiallitisation forms 1:1 clay minerals, kaolinite, with one silicon per aluminium; all the alkali and alkaline-earth cations leave. Allitisation removes the silicon entirely and leaves aluminium hydroxide, gibbsite.

The three degrees of hydrolysis of albite: the percentage of its sodium and of its silicon carried away in solution, computed from the balanced reactions, and the silicon to aluminium ratio of the solid left. The aluminium stays entirely in the solid in all three.
The three degrees of hydrolysis of albite: the percentage of its sodium and of its silicon carried away in solution, computed from the balanced reactions, and the silicon to aluminium ratio of the solid left. The aluminium stays entirely in the solid in all three.
Left: rotten granite in the Pyrenees, still in place but crumbling into a sand of quartz, feldspar and mica, with the loose sand at its foot; the pen gives the scale. Photograph: Pinpin, CC BY 2.5. Right: a weathering profile on the coast at Weipa, northern Australia: red bauxite, the product of allitisation, over a white kaolinite-rich sandstone. Photograph: Werner Schellmann, 1969, CC BY-SA 2.5. Both from Wikimedia Commons. Left: rotten granite in the Pyrenees, still in place but crumbling into a sand of quartz, feldspar and mica, with the loose sand at its foot; the pen gives the scale. Photograph: Pinpin, CC BY 2.5. Right: a weathering profile on the coast at Weipa, northern Australia: red bauxite, the product of allitisation, over a white kaolinite-rich sandstone. Photograph: Werner Schellmann, 1969, CC BY-SA 2.5. Both from Wikimedia Commons.
Left: rotten granite in the Pyrenees, still in place but crumbling into a sand of quartz, feldspar and mica, with the loose sand at its foot; the pen gives the scale. Photograph: Pinpin, CC BY 2.5. Right: a weathering profile on the coast at Weipa, northern Australia: red bauxite, the product of allitisation, over a white kaolinite-rich sandstone. Photograph: Werner Schellmann, 1969, CC BY-SA 2.5. Both from Wikimedia Commons.
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