Groutite

Groutite is a manganese oxide mineral with formula MnO(OH). It is a member of the diaspore group and is trimorphous with manganite and feitknechtite. It forms lustrous black crystals in the orthorhombic system.

It occurs in weathered banded iron formations, metamorphosed manganese ore bodies and hydrothermal ore environments. It was first described in 1945 for an occurrence in the Mahnomen mine, Cuyuna Range, Crow Wing County, Minnesota and named for petrologist Frank Fitch Grout (1880–1958), of the University of Minnesota.

单词	groutite
释义	groutite /'ɡrautait/ 英汉-汉英词典 n. 锰榍石词组 \| 习惯用语您要查找的是不是： graduate vt. 授予…学位；分等级；标上刻度 vi. 毕业；渐变 routine n. 例行公事；日常工作；程序 adj. 日常的；例行的 gratitude n. 感激, 感谢 grout vt. 用薄泥浆填塞；灌浆 n. 水泥浆；薄浆 groutite n. [矿物] 锰榍石英语百科 Groutite Groutite is a manganese oxide mineral with formula MnO(OH). It is a member of the diaspore group and is trimorphous with manganite and feitknechtite. It forms lustrous black crystals in the orthorhombic system. It occurs in weathered banded iron formations, metamorphosed manganese ore bodies and hydrothermal ore environments. It was first described in 1945 for an occurrence in the Mahnomen mine, Cuyuna Range, Crow Wing County, Minnesota and named for petrologist Frank Fitch Grout (1880–1958), of the University of Minnesota.
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groutite /'ɡrautait/

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Groutite