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电气石是分布很广的硼铝硅酸盐矿物,它广泛见于各种成因的岩石中。一般根据其中所含的特征可变元素含量又将它分为铁电气石、镁电气石、锂电气石及其他稀少种属。由于它产出普遍,因此有很多研究者对其成分、化学式、光学性质及结构进行了大量工作,并有一些结论性的意见。这些意见,有的又为以后的大量实际资料所证实,且为一般人所承认,如对于电气石中MgO的含量一般认为不能超过15％,1964年Г.П.巴尔桑诺夫等总结性地把MgO含量为6—15％、色素离子氧化物含量小于7.5％的最富镁种类列为镁电气石范围,并在此基础上,写出了镁电气石的相应化学式。最近我们的工作结果说明有大大超过此值的镁电气的存在,它的发现无疑将有助于我们对该矿物的更进一步认识。
Tourmaline is a widely distributed borosilicate mineral that is found in rocks of various genesis widely. In general, it is divided into iron tourmaline, magnesium tourmaline, lithium tourmaline and other rare species according to the variable element content contained therein. Because of its widespread output, many researchers have done a great deal of work on its composition, chemical formula, optical properties and structure, and have some concluding comments. These opinions, some of them are confirmed by a large amount of actual data in the future, and accepted by most people. For example, the content of MgO in tourmaline is generally considered as not more than 15%. In 1964, Г.П. 巴尔桑诺夫 summed up The MgO content of 6-15%, the pigment ion oxide content of less than 7.5% of the most magnesium type listed as magnesium tourmaline range, and on this basis, write the corresponding formula magnesium tourmaline. The results of our recent work show the existence of magnesium electrical appliances that greatly exceed this value and its findings will undoubtedly contribute to our greater understanding of the mineral.