主要矿物是自然铂矿、铁铂合金、钌铱锇矿、等轴锇铱矿和铱锇矿。
The trace element Rh exists mainly in native platinum, platinum-iron alloy and Pt-containing osmiridium.
由于在地球形成不久之后，几乎所有的铱都转变成为铁，沉入了地核中，因此地球表面的铱含量非常稀少。
Iridium is rare on the Earth's surface because almost all of it bound to iron and sank into the Earth's core soon after the planet had formed.
由于在地球形成不久之后，几乎所有的铱都转变成为铁，沉入了地核中，因此地球表面的铱含量非常稀少。
Iridium is rare on the Earth's surface because almost all of it bound to iron and sank into the Earth's core soon after the planet had formed.
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