合金：由两种或多种元素组成的金属材料，以化合物或固溶体形式存在。

Alloy: Metallic substance composed of two or more elements, as either a mixture, compound, or solid solution.

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通常铂在砂矿中以合金形式存在，其中包含80～90%的纯铂，或者不多见的是与砷或硫结合在一起。

Platinum is found usually as alloys of 80-90% purity in placer deposits or more rarely combined with arsenic or sulfur.

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