Novel stannosilicates. Part 1. Synthesis and characterisation

Abstract

New phases of sodium stannosilicate have been prepared by hydrothermal methods. One of these is crystalline with a very unusual habit. It has the composition Na₂O·1.38 SnO₂·2.05 SiO₂·2H₂O. Its synthesis and characterisation by chemical and thermal analysis are described. Additional information has been drawn from X-ray diffraction, scanning electron microscopy as well as Mössbauer and magic angle spinning n.m.r. spectroscopy.