δ-crystalline layered sodium disilicate is regarded as a new generation non-phosphate detergent builder for its good washing ability.This paper introduces the structure and bivalent ion binding mechanism ofδ-crystalline layered disilicate.It expatiates on the good properties ofδ-crystalline layered disilicate as a detergent builder in detail.And some doubtful questions are discussed such as dissolubility,stability and depositioa It indicates that theδ-crystalline layered disilicate has had the qualification...