A secondary iron mineral of variable composition based on amorphous hydrous ferric arsenate, occurring as pale grey, yellowish, or reddish to dark…
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| 单词 | θ7218 |
| 释义 | 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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