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>>黄金和铂金替代品
黄金和钨的物理性质 理论上讲,铀的密度是19.1g/cm3,差不多比铅重70%,它可以用来做假银币。但是它有弱放射性,也没有金重,所以用它做假金显得不切实际。 接着人们发现钨既环保又坚硬,最重要的是它的密度是19.25g/cm3,正好和金的密度(19.3g/cm3)相差无几,重量也差不多。这些优点使得钨成为比较好的贵金属如金或铂金的替代金属。
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