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the world > the earth > minerals > types of mineral > arsenates > [noun] > sulph-arsenate of iron (2)
pitticite1826

A secondary iron mineral of variable composition based on amorphous hydrous ferric arsenate, occurring as pale grey, yellowish, or reddish to dark…

pitch ore1896

(a) (more fully copper pitch ore) a dark brown ore of copper containing chrysocolla and limonite; also called pitchy copper ore; (b) = pitchblende, n.

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更新时间:2025/3/22 4:27:29