通常以小量广泛分布，偶尔出现游离状态，但往往是以铁、铅、银或铜的硒化物出现。
It is widely distributed, usually in small amounts, occasionally uncombined but more often as selenides of iron, lead, silver, or copper.
通常以小量广泛分布，偶尔出现游离状态，但往往是以铁、铅、银或铜的硒化物出现。
It is widely distributed, usually in small amounts, occasionally uncombined but more often as selenides of iron, lead, silver, or copper.
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