iridium

所属栏目：矿物学专业术语

Definition: the chemical element of atomic number 77,a hard,dense silvery-white metal自然铱zì rán yīIridium is a member of the transition series and is one of the densest metals. Iridium-platinumalloys are hard and corrosion-resistant and are used in jewelle ......（本文共 480 字 ）     [阅读本文] >>


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