Home > Term: grunerite
grunerite
A monoclinic mineral, (Fe,Mg)7Si8O22(OH)2; amphibole group, with Mg/(Mg+Fe)=0- 0.3 ; forms series with cummingtonite and with magnesiocummingtonite; fibrous or needlelike, commonly in radial aggregates; characteristic of iron formations in the Lake Superior and Labrador Trough regions. Also spelled gruenerite.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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