Abstract
By hydrothermal transformation of protonated kanemite in teramethylammoniun hydroxide (TMAOH) and water at temperatures above 130°C for 5 days, a new phase was formed and called FLS. Upon calcination up to 1000°C, this phase was transformed to a crystalline microporous silica material with high thermal stability. The calcined phase has a large surface area 335 m2 g−1 and micropore volume of 0.100 mL g−1 at 500°C. The solid state transformation of the as synthesized FLS to TMA-containing sodalite structure in sodium aluminate and TMAOH.5H2O mixture at 150°C for 1h is also reported.