^. Archived from the original on 2015-01-05. Retrieved 2014-05-12.
Bonewitz, 2008, Smithsonian Rock and Gem
January 01, 1970
richterite, sodium, calcium, magnesium, silicate, mineral, belonging, amphibole, group, iron, replaces, magnesium, within, structure, mineral, called, ferrorichterite, fluorine, replaces, hydroxyl, called, fluororichterite, crystals, long, prismatic, prismatic. Richterite is a sodium calcium magnesium silicate mineral belonging to the amphibole group If iron replaces the magnesium within the structure of the mineral it is called ferrorichterite if fluorine replaces the hydroxyl it is called fluororichterite Richterite crystals are long and prismatic or prismatic to fibrous aggregate or rock bound crystals Colors of richterite range from brown grayish brown yellow brownish to rose red or pale to dark green Richterite occurs in thermally metamorphosed limestones in contact metamorphic zones It also occurs as a hydrothermal product in mafic igneous rocks and in manganese rich ore deposits Localities include Mont Saint Hilaire Quebec and Wilberforce and Tory Hill Ontario Canada Langban and Pajsberg Sweden West Kimberley Western Australia Sanka Myanmar and in the US at Iron Hill Colorado Leucite Hills Wyoming and Libby Montana The mineral was named in 1865 for the German mineralogist Hieronymous Theodor Richter 1824 1898 RichteriteRichterite Wilberforce Monmouth Township Haliburton County Ontario Canada GeneralCategoryInosilicatesFormula repeating unit Na NaCa Mg5Si8O22 OH 2 IMA symbolRct 1 Strunz classification9 DE 20Crystal systemMonoclinicCrystal classPrismatic 2 m same H M symbol Space groupC2 mIdentificationColorBrown yellow red or greenCrystal habitPrismatic acicular or asbestiformTwinningSimple or multiple parallel to 100 CleavagePerfectFractureUneven brittleMohs scale hardness5 6LusterVitreousStreakPale yellowDiaphaneityTransparent to translucentSpecific gravity3 0 3 5Optical propertiesBiaxial Refractive indexna 1 615 nb 1 629 ng 1 636Birefringenced 0 021PleochroismStrong pale yellow orange and red2V angle68 measuredReferences 2 3 4 5 References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Handbook of Mineralogy PDF Archived from the original PDF on 2015 09 24 Retrieved 2014 05 11 Richterite on Mindat org Richterite data on Webmin IMA Master List Archived from the original on 2015 01 05 Retrieved 2014 05 12 Bonewitz 2008 Smithsonian Rock and Gem Retrieved from https en wikipedia org w index php title Richterite amp oldid 1207284164, wikipedia, wiki, book, books, library,
