• Cummingtonite - Wikipedia

    en.wikipedia.org/wiki/Cummingtonite Cummingtonite was named after the town of Cummington, Massachusetts, where it was discovered in 1824. It is also found in Sweden, South Africa, Scotland, and New Zealand.. Chemistry. Cummingtonite is a member of the cummingtonite-grunerite solid solution series which ranges from Mg 7 Si 8 O 22 (OH) 2 for magnesiocummingtonite to the iron rich grunerite endmember Fe 7 Si 8 O 22 (OH) 2.
  • Cummingtonite Mineral Data

    webmineral.com/data/Cummingtonite.shtml Cummingtonite Crystallography: Axial Ratios: a:b:c =0.5229:1:0.292 : Cell Dimensions: a = 9.534, b = 18.231, c = 5.3235, Z = 2; beta = 101.97° V = 905.18 Den(Calc)= 2.86
  • Cummingtonite: Mineral information, data and localities.

    www.mindat.org/min-1170.html Cummingtonite is defined as a monoclinic amphibole belong to the magnesium-iron-manganese amphibole subgroup. It is defined with Mg as the dominant element both in the B and C positions.
  • Cummingtonite | Definition of Cummingtonite by Merriam-Webster

    www.merriam-webster.com/dictionary/cummingtonite Cummingtonite definition is - a mineral (Fe, Mg)7Si8O22(OH)2 consisting of an ironmagnesium amphibole isomorphous with anthophyllite.
  • Cummingtonite - Exhibitionist & Voyeur - Literotica.com

    www.literotica.com/s/cummingtonite Thanks to Lilalocket for her constructive criticism. ***** It all started at a mining conference. I was six years out of my Ph.D. in geology, and after six years of dead-end postdoctoral fellowships and contract lab tech jobs and being turned down for every faculty position at every university in my field for which I was qualified for, I had finally given up the dream of being a tenured ...
  • Cummingtonite - definition of cummingtonite by The Free ...

    www.thefreedictionary.com/Cummingtonite Define cummingtonite. cummingtonite synonyms, cummingtonite pronunciation, cummingtonite translation, English dictionary definition of cummingtonite. n an amphibole mineral, magnesium iron silicate hydroxide, found in metamorphic rocks. Cummingtonite - definition of cummingtonite by The Free Dictionary.
  • Cummingtonite | mineral | Britannica

    www.britannica.com/science/cummingtonite Cummingtonite, an amphibole mineral, an iron and magnesium silicate that occurs in metamorphic rocks. For chemical formula and detailed physical properties, see amphibole
  • CUMMINGTONITE (Magnesium Iron Silicate Hydroxide)

    www.galleries.com/Cummingtonite Cummingtonite is the name of a series as well as the name of a mineral. The mineral cummingtonite, is basically the middle member of the Cummingtonite Series, which include the minerals grunerite and magnesiocummingtonite. All three minerals' formulae are essentially the same: (Mg, Fe)7Si8O22(OH)2. However the percentage of magnesium to iron varies in the series and determines the mineral ...
  • Cummingtonite | Definition of Cummingtonite at Dictionary.com

    www.dictionary.com/browse/cummingtonite Cummingtonite definition, an amphibole mineral, magnesium-iron silicate, similar in composition to anthophyllite but richer in iron. See more.
  • Cummingtonite | Article about cummingtonite by The Free ...

    encyclopedia2.thefreedictionary.com/cummingtonite Cummingtonite forms fibrous aggregates or radiating, columnar masses of brownish gray to dark brown color. It has a hardness of 5.5–6 on the mineralogical scale; its density ranges from 3,100 to 3,600 kg/m 3. Cummingtonite is a characteristic mineral of metamorphic schists.