一、前言 目前,在自然界已发现的金的矿物有20多种,主要为自然金以及金的金属互化物,其次,有金的碲化物,少量的锑化物、铋化物。近年,又发现了金的硒化物——硒金银矿。但是,金在自然界有没有呈硫化物形式存在,一直为矿物学和地球化学工作者所关注。Grat在封闭的玻璃管内,用升华的办法,首次合成了AgAuS_2-Ag_2S系列,但是,当时在自然界中尚未发 I. Preface At present, there are more than 20 kinds of gold minerals found in nature, mainly natural gold and gold intermetallics, and secondly, gold tellurides, small amounts of antimonides and bismuth compounds. In recent years, gold selenide has also been found - selenium gold and silver mine. However, the existence of gold as a sulfide in nature has been of concern to mineralogical and geochemical workers. Grat’s first synthesis of the AgAuS_2-Ag_2S series by sublimation in a closed glass tube has not yet occurred in nature