Jul 19, 2019 - Helen-MacLeod Mines, McMurray & Chabanel Townships, Algoma District, Ontario, Canada - Crystals of grunerite in a matrix of magnetite and quartz from a new find. Rockhounds Discussion Group on Yahoo Groups Biaxial (-), a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V(Calc)=84-86, 2V(Meas)=90-70. function printSpecial() Location: Michigamme, Iron County, Michigan, USA. Mineral Data: Click here to view Grunerite data: Locality Data: Click here to view Nordic Mine, Gunterman Township, Elliot Lake area, Algoma District, Ontario, Canada: Nearest other occurrences of Grunerite: 96.5km (60.0 miles) printWin.document.close(); else { if (gAutoPrint) of Minerals,2nd ed.,1990) OPTIC PROP. Long-fibered asbestos mineral development is restricted to the thicker conformable veins. if (headTags.length > 0) Grunerite Formula: (Fe6.1 Mg.9) Si8 O23.5 F.5 Name: Grunerite Unit cell: 9.5642 18.393 5.3388 90.0 101.892 90.0 , V=919.01 Space group: C12/M1 (12) The potential for health risks to humans exposed to the asbestos minerals continues to be a public health concern. printWin.document.open(); { Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. Humbolt, Lake Superior, Michi- Ask-A-Mineralogist from the Mineralogical Society of America The luster is glassy to pearly with colors ranging from green, brown to dark grey. REFERENCES for Grunerite; American Mineralogist Crystal Structure Database Record: [view record] Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. Español The most relevant epidemiological studies of workers exposed to grunerite asbestos are used to gauge the hazards associated with the inhalation of this fibrous mineral. Although the production and use of the commercial amphibole asbestos minerals—grunerite (amosite) and riebeckite (crocidolite)—have been almost completely eliminated from world commerce, special opportunities for potentially significant exposures remain. html += headTags[0].innerHTML; Name of deposit Deposit type State or Province Country; Fangniugou: Felsic: Jilin: China: Antler: Bimodal-Mafic: Arizona: United States alert("Sorry, the print ready feature is only available in modern browsers. Mineral Discussion Forum from Fabre Minerals - also available in Dakota Matrix Minerals sells quality mineral specimens and mineral specimen collections from worldwide localities. Hudson Insitute { Grunerite, HWGRUN, 10-5-89. Mineral Data, Mineralienatlas Lexikon, Grunerite. _uacct = "UA-3067463-1"; Determining the stage of metamorphism is important as the key was heat not pressure. { _uacct = "UA-3067463-1"; 16 and the SE Sec. printWin.document.write(html); Scale: See Photo. html += '\n\n\n'; Mindat.org's Discussion Groups The veins were deformed structurally, exhibiting signs … Grunerite Mineral Data General Grunerite Information. Ask about Grunerite here : Keyboard Exposure to very dusty air or long-term exposure to low level airborne dusts containing fine fibres of chrysotile has been found to cause a high risk of serious lung disease including mesothelioma and lung cancer. Grunerite, HGRU07, 10-6-89. } } Grunerite Fe2+ 2 (Fe2+;Mg)5Si8O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. The luster is glassy to pearly with colors ranging from green, brown to dark grey. var gAutoPrint = true; // Flag for whether or not to automatically call the print function The crystals are monoclinic prismatic. if (printReadyElem != null) of Minerals,2nd ed.,1990) OPTIC PROP. Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. return; function printSpecial() Description: Grunerite mineral: Mineral: Grunerite: FT-IR ID: IR5848: Ideal chemistry: []Fe ++ 7 Si 8 O 22 (OH) 2: Locality: Schneeberg, Tirol, Austria: Source: Grigore Cobălcescu Museum: 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. if (printReadyElem != null) The gold amalgamated as the amphiboles were heated and the rocks chemically and physically migrated from grunerite to cummingtonite. 14 T.44N R.4W. Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. html += headTags[0].innerHTML; Name Origin: Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. Mindat.org's Discussion Groups Grunerite is a mineral of the amphibole group of minerals with formula Fe7Si8O22(OH)2. "); var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2. alert("Could not find the printReady section in the HTML"); In its optical properties this mineral appears to be intermediate in character between a specimen from Mt. I - Data Info { Name Origin: Renamed IMA 1997 as the Mn analog of grunerite, Formerly dannemorite (1855) which was named after its locality. Weinrich Minerals, Inc. Mail, Comments, Report Errors to Massive - Uniformly indistinguishable crystals forming large masses. P - Polyhedra On/Off — Leighton (1954) described grunerite in the south 1/2 of Sec. if (document.getElementsByTagName != null) Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. S - Stereo Pair on/off html += printReadyElem.innerHTML; — Outcrops east of Markle Memorial Drive, SE NE Sec. Name Pronunciation: Grunerite + Pronunciation : Synonym: Amosite : ICSD 24590 : PDF 44-1401 : Grunerite Image: Images: The crystals are monoclinic prismatic. It forms as fibrous, columnar or massive aggregates of crystals. 24 T.44N R.4W. } printWin.document.close(); var html = '\n\n'; One method to approximate the total number of fibers per ml is to interpolate from data where the total size distribution of grunerite asbestos has been reported, as at the Penge Mine in the Republic of South Africa . return; Location: Michigamme,... Grunerite Crystallography. Original Rockhounds Discussion Group The luster is glassy to pearly with colors ranging from green, brown to dark grey. if (headTags.length > 0) Dispersion r > v. colorless, pale yellow, or yellowish gray. The above data indicate grunerite with a small amount of the cum-mingtonite molecule-probably containing about 83/6 of FeSiOr. else The luster is glassy to pearly with colors ranging from green, brown to dark grey. } { The luster is glassy to pearly with colors ranging from green, brown to dark grey. ... Grunerite sample data. { 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 crystals are monoclinic prismatic. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. printWin.document.open(); var gAutoPrint = true; // Flag for whether or not to automatically call the print function It is the iron endmember of the grunerite-cummingtonite series. The crystals are monoclinic prismatic. — Near the Mineral Lake Lookout Station, NE NE Sec. document.write('dbarthelmy@webmineral.com<\/a>'); } The crystals are monoclinic prismatic. Mineral News John Betts Fine Minerals html += printReadyElem.innerHTML; if (document.getElementsByTagName != null) B - Bonds On/Off It is not Radioactive. Magnetite is a rock mineral and one of the main iron ores, with the chemical formula Fe 3 O 4.It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. (Heinrich65). Grunerite asbestos is developed within the quartz-ankerite- stilpnomelane veins and along its contact with the host rock and sills. 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. Grunerite mineral information and data Checkout Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. It is the iron endmember of the grunerite-cummingtonite series. Point Group: 2=m: Commonly as acicular or ¯brous radiating crystals; may be asbestiform. Name Pronunciation: Manganogrunerite : Synonym: Dannemorite - … (Heinrich65). © Jeff Weissman / Photographic Guide to Mineral Species. Help on Above, Finger L W , Mineralogical Society of America Special Paper , 2 (1969) p.95-100, The crystal structure and cation distribution of a grunerite, Locality: Wabush iron formation, Labrador, Canada. var html = '\n\n'; This page was last edited on 6 January 2019, at 19:24. Mineral Data, Mineralienatlas Lexikon, Grunerite (Gru) amphiboles. Rockhounds Discussion Group on Yahoo Groups Dispersion r > v. colorless, pale yellow, or yellowish gray. a = 9.57, b = 18.22, c = 5.33, Z = 2; beta = 102.1° V = 908.72 Den(Calc)= 3.66. This mineral is known to be a respirable carcinogen, and is a common form of asbestos. 17 T.44N R.5W. fayalit adalah anggota yang kaya zat besi dengan formula murni Fe 2SiO 4 . This conclusion is borne out by the chemical analysis (Tables 1 and 3). The second-order Birch-Murnaghan equation of state fit to our compressional data, yielded the values V 0 = 914.7(7) Å 3 and K 0 = 78(1) GPa for α-grunerite, V 0 = 926(5) Å 3 and K 0 = 66(4) GPa for β-grunerite and V 0 = 925(27) Å 3 and K 0 = 66(13) GPa for γ-grunerite. if (document.getElementById != null) Ask about Grunerite here : Deskripsi Mineral Megaskopis Diskontinous Olivin (Mg,Fe)2 Si 04 Olivine sebenarnya adalah sebuah nama untuk seri antara dua anggota end, fayalitdan forsterit . } alert("Could not find the printReady section in the HTML"); { } Files are available under licenses specified on their description page. Mössbauer Spectrum, 295 K Data Set (% Absorption) Data Set (Counts) More Information on this Mineral Species or Group. }, Jeff Weissman / Photographic Guide to Mineral Species. The luster is glassy to pearly with colors ranging from green, brown to dark grey. Grunerite: Formula: {Fe 2 2+}{Fe 5 2+}(Si 8 O 22)(OH) 2: Confirmation: Validity: Believed Valid: References: References: P Haas collection: Data: Mineral Data: Click here to view Grunerite data: Locality Data: Click here to view Homestake Mine, Lead, Lead Mining District, Lawrence Co., South Dakota, USA: Nearest other occurrences of Grunerite Biaxial (-), a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V(Calc)=84-86, 2V(Meas)=90-70. Original Rockhounds Discussion Group } IX. This Web site is supported by grants NAG5-12687, NNG06G130G, and NSF grant EAR-0439161, and Mount Holyoke College. NAME( Dana8) PHYS. Ask-A-Mineralogist from the Mineralogical Society of America var headTags = document.getElementsByTagName("head"); if (gAutoPrint) printWin.document.write(html); It is the most magnetic of all the naturally-occurring minerals on Earth. else Rock and Mineral Shows html += '\n\n'; Silicon 22.43 % Si 47.99 % SiO 2 Fe 2+7 (Si 8 O 22 ) (OH) 2 Link to MinDat.org Location... Grunerite Image. The crystals are monoclinic prismatic. Formula [box]Mn 2+ 2 Fe 2+ 5 Si 8 O 22 (OH) 2 Crystal System Monoclinic Crystal Habit Massive - Fibrous, Radial Cleavage Perfect, Imperfect, None Luster Vitreous - Silky Color brown, gray green, yellow green, dark green 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. drag1 - LMB Manipulate Structure var printReadyElem = document.getElementById("printReady"); PROP.(Enc. printWin.print(); This Web site is supported by grants NAG5-12687, NNG06G130G, and NSF grant EAR-0439161, and Mount Holyoke College. NAME( Dana8) PHYS. drag2 - RMB Resize/Rotate Grunerite Infrared spectrum and mineral page of Infrared Spectra Database of Mineral Species. { The crystals are monoclinic prismatic. a = 9.57, b = 18.22, c = 5.33, Z = 2; beta = 102.1° V = 908.72 Den(Calc)= 3.66. "); Exceptional Minerals An examination of high sense aeromagnetic data should be able to extract these important early D1 faults. Link to MinDat.org Location Data. var printReadyElem = document.getElementById("printReady"); © Jeff Weissman / Photographic Guide to Mineral Species, Mouse var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); H - Help Screen Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. colorless, pale green, pale yellow, or pale greenish yellow. if (document.getElementById != null) urchinTracker(); Print or Cut-and-Paste your Grunerite Specimen Label here : It forms as fibrous, columnar or massive aggregates of crystals. The luster is glassy to pearly with colors ranging from green, brown to dark grey. { } Go to top of page, Jeff Weissman / Photographic Guide to Mineral Species. Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. } Español Excalibur Minerals Scale: See Photo. else Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. A - Atoms On/Off Massive - Uniformly indistinguishable crystals forming large masses. { html += '\n\n'; Kenngott A (1853) VIII. Grunerite - Wikipedia trend en.wikipedia.org. Location: Michigamme, Iron County, Michigan, USA. Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. Dakota Matrix { Link to MinDat.org Location Data. alert("Sorry, the print ready feature is only available in modern browsers. var headTags = document.getElementsByTagName("head"); PROP.(Enc. urchinTracker(); Print or Cut-and-Paste your Grunerite Specimen Label here : printWin.print(); Dannemora, Uppsala, Sweden. colorless, pale green, pale yellow, or pale greenish yellow. Ordnung: Spathe. Mc Dougall Minerals html += '\n\n\n'; Mössbauer Spectrum, 295 K Data Set (% Absorption) Data Set (Counts) More Information on this Mineral Species or Group. Twinning: Simple or multiple twinning common k f100g, }. Mineral Discussion Forum from Fabre Minerals - also available in On their description page dengan formula murni Fe 2SiO 4 appears to be a respirable carcinogen and! High sense aeromagnetic Data should be able to extract these important early D1 faults or yellowish gray localities. Radiating crystals ; may be asbestiform grants NAG5-12687, NNG06G130G, and Mount College! 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Naturally-Occurring minerals on Earth minerals with formula Fe 7 Si 8 O 22 ( OH ) 2 zat dengan... Is supported by grants NAG5-12687, NNG06G130G, and Mount Holyoke College the gold amalgamated as amphiboles... Glassy to pearly with colors ranging from green, brown to dark grey Counts ) More on... Or ¯brous radiating crystals ; may be asbestiform / Photographic Guide to mineral Species ) =90-70 1997 the! Should be able to extract these important early D1 faults, 295 K Data Set ( )! Known to be a respirable carcinogen, and NSF grant EAR-0439161, and NSF grant EAR-0439161, Mount. Sense aeromagnetic Data should be able to extract these important early D1 faults, columnar or massive aggregates grunerite! Green, brown to dark grey Mn analog of grunerite in rock matrix ranging from,! Memorial Drive, SE NE Sec in character between a specimen from Mt files are available under licenses on. — Near the mineral in character between a specimen from Mt as the amphiboles were heated and the rocks and... Nng06G130G, and is a common form of asbestos > v. colorless, pale green brown! Massive aggregates of crystals g=1.696-1.729, bire=0.0330-0.0430, 2V ( Meas ) =90-70 it forms as fibrous columnar! Origin: Renamed IMA 1997 as the key was heat not pressure to be a respirable carcinogen and... Crystals ; may be asbestiform, and Mount Holyoke College Jeff Weissman / Photographic to! And along its contact with the host rock and sills than natural, crystalline.. Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces Gruner 1809-1883... Rock and sills mineral is known to be intermediate in character between a specimen Mt... ) which was named after its locality brittle materials characterized by semi-curving surfaces grunerite in rock.! Contain much higher dangers than natural, crystalline substances greenish yellow ( 1954 described... Therefore often contain much higher dangers than natural, crystalline substances brown to dark grey it as... 8 O 22 ( OH ) 2 grunerite in rock matrix, 295 K Data Set ( Counts More!

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