A carbonate of calcium and magnesium. Non-combustible. Used as a refractory for furnaces, in the manufacture of magnesium compounds and magnesium metals, etc.
白云石: 一种由钙和镁组成的碳酸盐。不可燃的。用作熔炉耐火材料,用于制造镁化合物和镁金属等。