铱锇矿一种矿石，是少量铂、铑及其他金属矿石的铱锇的自然合金，用于制造针头和耐磨尖端。
A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum, rhodium, and other metals, used in needles and wearing points.
自然界中可能不存在纯铱，通常和其它贵金属共生于天然合金中。
Iridium probably does not occur uncombined in nature but it is found in natural alloys with other noble metals.
自然界中可能不存在纯铱，通常和其它贵金属共生于天然合金中(化学活性不活跃或迟钝)。
It probably does not occur uncombined in nature But is found in natural alloys with other noble (i. e., chemically inactive or inert) metals.
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