A silicate in which aluminium replaces some of the silicon, especially a rock-forming mineral such as a feldspar or a clay mineral.
- These minerals are hydrated aluminosilicates consisting of sheets of alumina and silica with interchangeable cations and considerable amounts of combined or loosely bound water.
- In carbonate-rich soils, rapid neutralization of rainwater by carbonate minerals restricts the mobilization of aluminosilicates and oxides.
- The weathering and decay of aluminosilicate minerals occurs by hydrolysis, and it is well documented that the rate of many hydrolysis reactions is sensitive to pH.
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