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No. Potassium silicate is not the same as potassium aluminum silicate.
Potassium silicate
Potassium Silicate
It is a mixture of potassium salt [K+ and ?-] with an impure form of potassium carbonate. So it is a non-silicate, as it contains no silica.
If you mean potassium Cyanide, the formula is KCN