• Grunerite: Mineral information, data and localities.

    www.mindat.org/min-1758.html Grunerite is defined as a monoclinic amphibole belong to the magnesium-iron-manganese amphibole subgroup. It is defined with Fe 2+ as the dominant element both in the B and C positions.
  • Grunerite - Wikipedia

    en.wikipedia.org/wiki/Grunerite Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. The crystals are monoclinic prismatic. The luster is glassy to pearly with colors ranging from green, brown to dark grey.
  • Grunerite Mineral Data

    webmineral.com/data/Grunerite.shtml Visit our Advertisers for Grunerite : Dakota Matrix Minerals Google Search for Grunerite John Betts Fine Minerals Search for Grunerite Rock and Mineral Shows Google Search for Grunerite Weinrich Minerals, Inc. Google Search for Grunerite. Ask about Grunerite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's ...
  • Grunerite | mineral | Britannica

    www.britannica.com/science/grunerite The monoclinic cummingtonite-grunerite series exists from about Fe 2 Mg 2 Si 8 O 22 (OH) 2 to Fe 7 Si 8 O 22 (OH) 2. Intermediate amphibole compositions do not exist between anthophyllite and the tremolite-actinolite series. Compositional gaps also exist between the cummingtonite-grunerite series and other calcic amphiboles.
  • A risk assessment for exposure to grunerite asbestos ...

    www.pnas.org/content/96/7/3412 Grunerite asbestos is developed within the quartz–ankerite–stilpnomelane veins and along its contact with the host rock and sills. The veins were deformed structurally, exhibiting signs of shearing, brecciation, faulting, and folding.
  • Grunerite | Article about grunerite by The Free Dictionary

    encyclopedia2.thefreedictionary.com/grunerite The proposal directly concerns the following products: actinolite asbestos, grunerite asbestos, anthophyllite asbestos, chrysotile asbestos, crocidoliteand tremolite.aAsbestos is well recognised as a health hazard and is highly regulated.
  • Grunerite - Mindat.org

    www.mindat.org/gm/1758 This is a photo of multiple green, radial, "sprays" of Grunerite crystals collected at the Spurr Mine located near Michigamme, Michigan. Grunerite is actually quite common on the wooded mine dumps of the Spurr Mine, but I have not seen full circles of grunerite sprays before. Specimen collected in August, 2017
  • Wisconsin Geological & Natural History Survey » Grunerite

    wgnhs.wisc.edu/minerals/grunerite — Grunerite is a component of rocks at the Pine River Reservoir, about 5 miles south of Florence (Nielsen, 1964). IRON COUNTY: Grunerite occurs with magnetite in the pits of the Lucas-Whiteside exploration in Sec. 4 T.41N R.1E, near Butternut (Dutton and Bradley, 1970).
  • Grunerite Fe2+ 2 5 8 22 2 - Handbook of Mineralogy

    handbookofmineralogy.org/pdfs/grunerite.pdf Grunerite Fe2+ 2 (Fe2+;Mg)5Si8O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Commonly as acicular or ¯brous radiating crystals; may be asbestiform. Twinning: Simple or multiple twinning common k f100g,
  • Grünerite | Definition of Grünerite by Merriam-Webster

    www.merriam-webster.com/dictionary/gr%C3%BCnerite Grünerite definition is - a variety of amphibole Fe7Si8D22(OH)2. Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.. Start your free trial today and get unlimited access to America's largest dictionary, with: . More than 250,000 words that aren't in our free dictionary