天青石是一种非金属矿物,化学组成为硫酸锶(SrSO_4),是目前唯一大规模开发利用的含锶矿物。国外已从事天青石开发的国家为数不多,主要有墨西哥、西班牙、伊朗、英国和土耳其等国家,其生产基木上均被个别公司所控制。目前世界需求量年平均增长率估计为3～5％,因而国际天青石市场行情非常稳定。八十年代初期世界天青石年产量为 Celestite is a non-metallic mineral with a chemical composition of barium sulfate (SrSO 4 ), and is the only barium-containing mineral currently exploited on a large scale. There are only a few countries that have engaged in the development of celestite in foreign countries, mainly Mexico, Spain, Iran, the United Kingdom and Turkey. Their production bases are controlled by individual companies. At present, the average annual growth rate of world demand is estimated to be 3 to 5%, so the international celestite market conditions are very stable. The annual production of celestine in the world in the early 1980s was