天然银
It was also found that, besides native silver, there existed coPPer-bearing argentite which seemed to be an alternation Product through the replacing of native silver by late-formed copper sulfide.
银矿物除自然银外,还见有后期铜的硫化物交代自然银形成的含铜辉银矿。
A method is proposed to determine free native silver and free silver sulphide in lead-zinc concentrate.
拟定了分离测定铅锌精矿中游离硫化银和游离自然银的方法.
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