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有关铌钽在黑钨矿中赋存形式研究的文章已有不少,但是各个作者的结论往往矛盾。因为某些黑钨矿的精选矿砂已可作为铌钽的很重要来源,所以铌钽赋存形式问题就有明显的意义。 戈尔德施密特认为,在黑钨矿中含有钪的钨酸盐(钽酸盐),它类质同象地替代钨锰矿或钨铁矿分子。但是在黑钨矿中并不存在铌和钪之间的相关关系,另外一些间接资料可作为重新审查这个观点的依据。但是,铌钽类质同象进入黑钨矿晶格的事实已为
There are a lot of articles on the study of the occurrence of niobium and tantalum in wolframite, but the conclusions of various authors often contradict. Since some selected ores of wolframite have become a very important source of niobium and tantalum, the problem of the form of niobium and tantalum present is of significant importance. Gold Schmidt believes that tungstate (tantalate), which contains scandium in wolframite, is an isomorphic alternative to the wolframite or tungstovite molecule. However, there is no correlation between niobium and scandium in wolframite and some other indirect data can serve as a basis for reexamining this view. However, the fact that the niobium-tantalum isomerizes into the wolframite lattice has been