摘要
砷酸盐矿物在世界上已发现达160余种之多,但在我国对其发现和研究得较少。该类矿物的化学组成十分复杂,并具有较独特的矿物学特征和地质产状,常以其绿色、黄绿色或褐红色等较鲜艳的颜色及主要呈纤维状、针柱状、柱状、板状、立方体状和葡萄状、肾状等结晶特征而在氧化带次生矿物中较易引人注目。砷酸盐矿物一般只形成于湿热多雨的热带—亚热带气候条件地区和介质pH值为6—8的含砷的硫化物矿床氧化带中。加强开展对该类矿物的研究,将可大大丰富我国的矿物学内容,并在氧化矿石综合利用及作为地质找矿的矿物学标志等方面也具有重要的现实意义。
There are over 160 known species of arsenate mineral in the world, but only a small fraction of them have been found and studied in China. These species are characterized by complicated chemical compositions, distinctive mineralogy and geological occurrences. They generally occur as secondary minerals in the oxidized zone and are conspicuous not only for their bright colours such as green, greenish yellow and brownish red but also for their unique morphologies such as fiber, needle, prism, tablet, cube, botryoid and kidney. Arsenate, minerals are generally formed in the oxidized zone of arsenic - bearing sulfide deposits with PH values ranging from 6 to 8 in tropical to subtropical hot and bumid climates. It is believed that more and further studies on these minerals will make a great contribution to mineralogy and will be of important significance in comprehensive utilization of oxidized ores and in search for ore deposits.
