6Na[Al(OH)4]
Na6[Al6O4(OH)16] + 4H2O
The decomposition of sodium tetrahydroxoaluminate to produce tetraoxohexadecahydroxosodium aluminate and water. Tetrahydroxoaluminate - saturated solution. This reaction takes place at a temperature near 40°C in the 50% NaOH.