碳酸钙(CaCO 3 )是一种存在于白垩、石灰石和大理石中的天然材料。它由三种元素组成，包括碳、氧和钙。它是由二氧化碳与熟石灰或烧石灰反应形成。它可以用于从工业、食品到农业的各种应用。 Calcium Carbonate (CaCO 3 ) is a naturally found material in chalk, limestone, and marble. It is composed of three elements which include carbon, oxygen, and calcium. It is formed by reacting carbon dioxide with slaked or burnt lime. It can be used for a variety of applications ranging from industrial, food to agriculture.