| 单词 | grey manganese |
| 释义 | > as lemmasgrey manganese grey manganese n. Mining (now rare) (also grey manganese ore) either of two minerals containing manganese, manganite and pyrolusite. ΚΠ 1793 T. King Catal. Duplicates Ores: Pt. 2nd 22 Grey manganese, in coarse plum pudding stone. 1852 F. Overman Treat. Metall. iii. v. 466 The most valuable kind of this mineral is the crystallized variety, called gray manganese—pyrolusite. 1876 P. de P. Ricketts Notes Assaying 120 Manganese occurs in an oxidized form, and its principal ores are..manganite (gray manganese ore). 1919 Jrnl. Amer. Chem. Soc. 41 935 The author dissolved crystallized Ilfeld grey manganese ore in hydrochloric acid. 1987 Proc. Internat. Waste Managem. Conf. 170 (table) Mixed sorbent is a mixture of 50% (wt.) of clinoptilotite and 50% (wt.) of gray manganese. < as lemmas |
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