THE CHARACTERISTICS AND CRYSTAL STRUCTURE OF A NEW COMPOUND Li_(8-2x)(SiO_4)_(2-x)(SO_4)_x

In the pseudo-binary system Li2SO4-Li4SiO4 at compositional range 52—71 mol％ Li2SiO4, there exists a compound Li8-2x（SiO4）2-x（SO4）x,x=0.58-0.96, formed by peritectic reaction at 953℃. At room temperature this compound can absorb gases in the air. Thermogravimetric analysis showed that the sample after being saturated with gases can lose 7.65% of its weight at 350—500℃ (loss weight tem-