What is the main chemical composition of clay?

Clay is mainly composed of silicate minerals. Clay is a kind of cohesive soil with little sand content, and it has good plasticity only when water is not easy to pass through. Generally speaking, clay is formed after silicate minerals are weathered on the earth's surface. Generally, it is weathered in situ, with large particles and composition close to the original stone. It is called primary clay or primary clay. This kind of clay is mainly composed of silica and alumina, which is white and fire-resistant, and is the main raw material for preparing porcelain clay. Clay, also known as clay, is a very small particle (