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Optically distinguishable from rutile only in reflected light microscopy, through its slightly higher brightness and the intense royal blue color of its internal reflections in crossed nicols.","The intense royal blue internal reflections are a distinguishing feature, in contrast to the white internal reflections of rutile and to the brown to pink internal reflections of TiO2-II, respectively.","Intense, royal blue internal reflections.","Exhibits blue fluorescence under the electron beam like both rutile and TiO2-II.\r\nThe mineral is extremely sensitive to any laser or focused electron beam irradiation and it inverts in seconds to rutile.","Heavily shocked garnet-cordierite-sillimanite gneiss in a meteorite impact crater.","Collection of the Bayerisches Geoinstitut, Universität Bayreuth, Germany, El Goresy section No. BGI 3.","A TiO2 polymorph with a baddeleyite-like structure, resulting from high pressure impact at a meteorite crater.","Named in honor of Masaki Akaogi (赤荻正樹), Professor in the Department of Chemistry, Gakushuin University, Tokyo, Japan, for his \"seminal contributions to experimental petrology, calorimetry, and mineralogy, including experimental characterization of high-pressure polymorphs of TiO2 relevant to planetary deep interiors.\"","2025-08-11 12:15:01",[],[47],{"id":48,"name":49,"entrytype":9,"csystem":28,"ima_formula":50,"mindat_formula":50,"hmin":51,"hmax":51,"dmeas":52,"dcalc":53,"primary_image_id":54},480,"Baddeleyite","ZrO\u003Csub>2\u003C\u002Fsub>",6.5,"5.4","5.83",2500,[],[57,66,73,77],{"id":58,"name":59,"entrytype":9,"csystem":60,"ima_formula":15,"mindat_formula":15,"hmin":61,"hmax":62,"dmeas":63,"dcalc":64,"primary_image_id":65},213,"Anatase","Tetragonal",5.5,6,"3.79","3.89",1314,{"id":67,"name":68,"entrytype":9,"csystem":69,"ima_formula":15,"mindat_formula":15,"hmin":61,"hmax":62,"dmeas":70,"dcalc":71,"primary_image_id":72},787,"Brookite","Orthorhombic","4.08","4.133",4019,{"id":74,"name":75,"entrytype":9,"csystem":28,"ima_formula":15,"mindat_formula":15,"hmin":11,"hmax":11,"dmeas":11,"dcalc":76,"primary_image_id":11},51474,"Riesite","4.37",{"id":78,"name":79,"entrytype":9,"csystem":60,"ima_formula":15,"mindat_formula":15,"hmin":62,"hmax":51,"dmeas":80,"dcalc":81,"primary_image_id":82},3486,"Rutile","4.23","4.25",30644,[84,90,95],{"id":85,"txt":86,"latitude":87,"longitude":88,"country":89},68066,"Seelbronn Quarry, Amerdingen, Donau-Ries District, Swabia, Bavaria, Germany",48.7225,10.4886111,"Germany",{"id":91,"txt":92,"latitude":93,"longitude":94,"country":89},68067,"Otting, Donau-Ries District, Swabia, Bavaria, Germany",48.8611362,10.7324465,{"id":96,"txt":97,"latitude":98,"longitude":99,"country":89},186423,"Altenbürg quarry, Riesbürg, Ostalbkreis, Stuttgart Region, Baden-Württemberg, Germany",48.813652,10.431086,[101,104,108],{"id":102,"year":24,"html":103,"doi":11},16009687,"El Goresy, A., Dubrovinsky, L.S., Gillet, P., Graup, G., Chen, M. (2010) Akaogiite: An ultra-dense polymorph of TiO2 with seven-coordinated titanium, in shocked garnet gneisses from the Ries Crater, Germany. American Mineralogist: 95: 892-895.",{"id":105,"year":106,"html":107,"doi":11},16137452,2016,"www.typmineral.uni-hamburg.de (n.d.) \u003Ca target='_blank' rel='nofollow' href='http:\u002F\u002Fwww.typmineral.uni-hamburg.de\u002Ftables\u002Fen\u002Fakaogiite.html'>http:\u002F\u002Fwww.typmineral.uni-hamburg.de\u002Ftables\u002Fen\u002Fakaogiite.html\u003C\u002Fa>",{"id":109,"year":110,"html":111,"doi":11},16962584,2021,"(2021) Akaogiite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002FAkaogiite.pdf' class='refpdflink'>\u003C\u002Fa>",[],[],[115,116],"Akaogiiet","IMA2007-058",[118,122,127,131,135,139,143,147,151,155,159],{"lang":119,"names":120},"ca",[121],"akaogiïta",{"lang":123,"names":124},"de",[125,126],"Akaogiit","IMA 2007-058",{"lang":128,"names":129},"es",[130],"Akaogiíta",{"lang":132,"names":133},"eu",[134],"Akaogiita",{"lang":136,"names":137},"it",[138],"akaogiite",{"lang":140,"names":141},"nn",[142],"Akaogiitt",{"lang":144,"names":145},"ru",[146],"Акаогиит",{"lang":148,"names":149},"sl",[150],"akaogiit",{"lang":152,"names":153},"ta",[116,154],"அகோகைட்டு",{"lang":156,"names":157},"uk",[158],"Акаогіїт",{"lang":160,"names":161},"zh",[162],"赤荻石","Q12713259",{"history":11,"applications":11}]