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Found as a residue after dissolution of the Toluca iron meterorite.","2026-03-31 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meteorite, Jiquipilco (Xiquipilco), Mexico, Mexico",19.5666667,-99.5666667,"Mexico",22,[249,253,257,260,264,269,273,277,281,286,290,295,299,303,308,312,316,320,325],{"id":250,"year":251,"html":252,"doi":11},16114169,1897,"Laspeyres, H. (1897) Die steinigen Gemengtheile im Meteoreisen von Toluca in Mexico. Zeitschrift für Krystallographie und Mineralogie: 27: 586–600.",{"id":254,"year":255,"html":256,"doi":11},524412,1965,"Fleischer, Michael (1965) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  50 (11-12) 2096-2111 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM50\u002FAM50_2096.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":258,"year":255,"html":259,"doi":11},16114171,"Gübelin, E. (1965): Maw-sit-sit proves to be jade-albite. J. Gemmology 9 (11), 372-379. [as \"chrome-jadeite\"]",{"id":261,"year":255,"html":262,"doi":263},2224475,"Frondel, C., Klein, C. (1965) Ureyite, NaCrSi2O6: A New Meteoritic Pyroxene. \u003Ci>Science\u003C\u002Fi>, 149 (3685). 742-744 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1126\u002Fscience.149.3685.742'>doi:10.1126\u002Fscience.149.3685.742\u003C\u002Fa>","10.1126\u002Fscience.149.3685.742",{"id":265,"year":266,"html":267,"doi":268},5726374,1967,"Neuhaus, A. (1967) Über Kosmochlor (Ureyit). \u003Ci>Die Naturwissenschaften\u003C\u002Fi>,  54 (15). 440-441 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00603143'>doi:10.1007\u002Fbf00603143\u003C\u002Fa>","10.1007\u002Fbf00603143",{"id":270,"year":271,"html":272,"doi":11},524911,1968,"Fleischer, Michael (1968) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  53 (3-4) 507-511 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM53\u002FAM53_507.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":274,"year":275,"html":276,"doi":11},16099411,1969,"Clark, J.R., Appleman, D.E., Papike, J.J. (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper: 2: 31-50.",{"id":278,"year":279,"html":280,"doi":11},526092,1973,"Cameron, Maryellen, Sueno, Shigeho, Prewitt, C. T., Papike, and J. J. (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite. \u003Ci>American Mineralogist\u003C\u002Fi>,  58 (7-8) 594-618 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM58\u002FAM58_594.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":282,"year":283,"html":284,"doi":285},3269,1981,"Couper, A. G., Hey, M. H., Hutchison, R. (1981) Cosmochlore—a new examination. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  44 (335) 265-267 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1981.044.335.04'>doi:10.1180\u002Fminmag.1981.044.335.04\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_44\u002F44-335-265.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1981.044.335.04",{"id":287,"year":288,"html":289,"doi":11},528023,1984,"Yang, Chin Mei Ou (1984) A terrestrial source of ureyite. \u003Ci>American Mineralogist\u003C\u002Fi>,  69 (11-12) 1180-1183 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM69\u002FAM69_1180.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":291,"year":292,"html":293,"doi":294},16485660,1988,"Morimoto, N., Fabries, J., Ferguson, A. K., Ginzburg, I. V., Ross, M., Seifert, F. A., Zussman, J., Aoki, K., Gottardi, G. (1988) Nomenclature of Pyroxenes. \u003Ci>Mineralogical Magazine\u003C\u002Fi>, 52 (367) 535-550 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1988.052.367.15'>doi:10.1180\u002Fminmag.1988.052.367.15\u003C\u002Fa>","10.1180\u002Fminmag.1988.052.367.15",{"id":296,"year":297,"html":298,"doi":11},16048876,1996,"Greshake, A., Bischoff, A. (1996). Chromium-bearing Phases in Orgueil (CI): Discovery of Magnesiochromite (MgCr2O4), Ureyite (NaCrSi2O6), and Chromium Oxide (Cr2O3). Lunar and Planetary Science, 27, 461.",{"id":300,"year":301,"html":302,"doi":11},16965373,2001,"(2001) Kosmochlor. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fkosmochlor.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":304,"year":305,"html":306,"doi":307},394597,2002,"Secco, L., Martignago, F., Negro, A. Dal, Reznitskii, L.Z., Sklyarov, E.V. (2002) Crystal chemistry of Cr3+-V3+-rich clinopyroxenes. \u003Ci>American Mineralogist\u003C\u002Fi>,  87 (5) 709-714 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2002-5-613'>doi:10.2138\u002Fam-2002-5-613\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol87\u002FAM87_709.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-2002-5-613",{"id":309,"year":310,"html":311,"doi":11},16327064,2003,"Zozulya D R, Gavrilenko B V, Savchenko Y E (2003) Kosmochlor (NaCrSi2O6) from coastal sediments of Tersky coast in the White sea, Kola peninsula, Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 132, issue 3, 101-108",{"id":313,"year":310,"html":314,"doi":315},394855,"Origlieri, Marcus J., Downs, Robert T., Thompson, Richard M., Pommier, Carolyn J.S., Denton, M. Bonner, Harlow, George E. (2003) High-pressure crystal structure of kosmochlor, NaCrSi2O6, and systematics of anisotropic compression in pyroxenes. \u003Ci>American Mineralogist\u003C\u002Fi>,  88 (7) 1025-1032 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2003-0711'>doi:10.2138\u002Fam-2003-0711\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol88\u002FAM88_1025.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-2003-0711",{"id":317,"year":310,"html":318,"doi":319},394719,"Sakamoto, Shizue, Shimobayashi, Norimasa, Kitamura, Masao (2003) Incommensurate phase in the kosmochlor-diopside join: A new polymorph of clinopyroxene. \u003Ci>American Mineralogist\u003C\u002Fi>,  88 (10) 1605-1607 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2003-1024'>doi:10.2138\u002Fam-2003-1024\u003C\u002Fa>","10.2138\u002Fam-2003-1024",{"id":321,"year":322,"html":323,"doi":324},243673,2005,"Shi, G. H., Stöckhert, B., Cui, W. Y. (2005) Kosmochlor and chromian jadeite aggregates from the Myanmar jadeitite area. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  69 (6) 1059-1075 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002F0026461056960308'>doi:10.1180\u002F0026461056960308\u003C\u002Fa>","10.1180\u002F0026461056960308",{"id":326,"year":327,"html":328,"doi":329},153958,2014,"Posner, Esther S., Dera, Przemyslaw, Downs, Robert T., Lazarz, John D., Irmen, Peyton (2014) High-pressure single-crystal X-ray diffraction study of jadeite and kosmochlor. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  41 (9) 695-707 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00269-014-0684-y'>doi:10.1007\u002Fs00269-014-0684-y\u003C\u002Fa>","10.1007\u002Fs00269-014-0684-y",[331,341],{"id":332,"source_url":333,"license_code":334,"credit_html":335,"title":336,"description":337,"author":338,"original_width":339,"original_height":340},13574,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=18034762","CC BY-SA 3.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=18034762\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Kosmochlor jade, Jurassic, Burma 1.jpg","Kosmochlor jade (\"maw sit sit\") (8.0 cm across along the base) from the Hpakan-Tawmaw Jade Tract (near-latest Jurassic, 147 m.y.) of northern Burma.\n\u003Cp>Maw sit sit is a very rare, complex, polymineralic metamorphic rock.  Minerals reported in this material include chromite (metallic black, FeCr2O4), kosmochlor pyroxene (emerald green to dark green to black, NaCrSi2O6), chromian jadeite pyroxene (green, Na(Al,Fe,Cr)Si2O6), chromiferous arfvedsonite amphibole (green or gray, Cr-bearing NaNa2Fe5Si8O22(OH)2), symplectite (green, a finely-crystalline mineral mix of mostly chromian jadeite).  Reported matrix minerals include thompsonite zeolite, albite feldspar, or serpentine.\n\u003C\u002Fp>\u003Cp>Maw sit sit formed under high pressure and low temperature conditions at the rim of serpentinized, chromiferous mantle peridotites.  The peridotites were emplaced by obduction as oceanic lithosphere was subducting beneath the Burmese portion of southeastern Asia during the Mesozoic.\n\u003C\u002Fp>\u003Cp>Geologic unit: northeastern end of the Hpakan-Tawmaw Jade Tract, Hpakan Ultramafic Body, Naga-Adaman Ophiolite.\n\u003C\u002Fp>\u003Cp>Metamorphic age: late Tithonian Stage, near-latest Jurassic, 147 m.y.\n\u003C\u002Fp>\u003Cp>Locality: apparently an alluvial clast derived from the Namshamaw Deposit (\"Namshamaw Dike\"; \"Maw Sit Sit Vein\") at Maw Sit Sit, just northwest of Namshamaw, near Kansi (Kanzi), western Kachin State, Indo-Burma Range, northern Burma.\n\u003C\u002Fp>\nPhoto from & info. synthesized by James St. John (School of Earth Sciences, Ohio State University at Newark; Newark, Ohio, USA).","James St. John",733,718,{"id":342,"source_url":343,"license_code":344,"credit_html":345,"title":346,"description":347,"author":338,"original_width":348,"original_height":349},13575,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=35218613","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=35218613\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Mawsitsit (kosmochlor jade) Kachin State, Burma.jpg","\u003Cp>Kosmochlor jade (“maw sit sit”) (8.0 cm across along the base) from the Hpakan-Tawmaw Jade Tract (near-latest Jurassic, 147 m.y.) of northern Burma.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Maw sit sit is a very rare, complex, polymineralic metamorphic rock.  Minerals reported in this material include chromite (metallic black, FeCr2O4), kosmochlor pyroxene (emerald green to dark green to black, NaCrSi2O6), chromian jadeite pyroxene (green, Na(Al,Fe,Cr)Si2O6), chromiferous arfvedsonite amphibole (green or gray, Cr-bearing NaNa2Fe5Si8O22(OH)2), symplectite (green, a finely-crystalline mineral mix of mostly chromian jadeite).  Reported matrix minerals include thompsonite zeolite, albite feldspar, or serpentine.\n\u003C\u002Fp>\u003Cp>Maw sit sit formed under high pressure and low temperature conditions at the rim of serpentinized, chromiferous mantle peridotites.  The peridotites were emplaced by obduction as oceanic lithosphere was subducting beneath the Burmese portion of southeastern Asia during the Mesozoic.\n\u003C\u002Fp>\u003Cp>Geologic unit: northeastern end of the Hpakan-Tawmaw Jade Tract, Hpakan Ultramafic Body, Naga-Adaman Ophiolite.\n\u003C\u002Fp>\u003Cp>Age: Syngenetic zircons indicate that Burmese jades formed at 147 Ma (late Tithonian Stage, near-latest Jurassic.  The serpentinite host rocks formed (metamorphic age) at 163 Ma (Middle Jurassic).  Older literature interprets Burmese jadeitite as Tertiary in age, hosted by Late Creatceous to Eocene serpentinized peridotites.\n\u003C\u002Fp>\u003Cp>Locality: apparently an alluvial clast derived from the Namshamaw Deposit (\"Namshamaw Dike\"; “Maw Sit Sit Vein\") at Maw Sit Sit, just northwest of Namshamaw, near Kansi (Kanzi), western Kachin State, Indo-Burma Range, northern Burma.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>References on maw sit sit:\n\u003C\u002Fp>\u003Cp>Colombo, F., C. Rinaudo & C. Trossarelli.  2000.  The mineralogical composition of maw-sit-sit from Myanmar.  Journal of Gemmology 27(2): 87-92.\n\u003C\u002Fp>\u003Cp>Harlow, G.E. & E.P. Olds.  1987.  Observations on terrestrial ureyite and ureyitic pyroxene.  American Mineralogist 72: 126-136.\n\u003C\u002Fp>\u003Cp>Shi Guang-Hai, Jiang Neng, Liu Yan, Wang Xia, Zhang Zhi-Yu & Xu Yong-Jing.  2009.  Zircon Hf isotope signature of the depleted mantle in the Myanmar jadeitite: implications for Mesozoic intra-oceanic subduction between the Eastern Indian Plate and the Burmese Platelet.  Lithos 112: 342-350.\n\u003C\u002Fp>\u003Cp>Shi G.H., B. Stockhert & Cui W.Y.  2005.  Kosmochlor and chromian jadeite aggregates from teh Myanmar jadeitite area.  Mineralogical Magazine 69: 1059-1075.\n\u003C\u002Fp>\nYang Chiu Mei Ou.  1984.  A terrestrial source of ureyite.  American Mineralogist 69: 1180-1183.",1128,1109,[351,357,361,366],{"id":352,"url":353,"label":354,"formula":355,"spacegroup":356,"year":327},7246,"\u002Fcif\u002F7246.cif","Posner 2014","Na Cr Si2 O6","C 1 2\u002Fc 1",{"id":358,"url":359,"label":360,"formula":355,"spacegroup":356,"year":310},7251,"\u002Fcif\u002F7251.cif","Origlieri 2003",{"id":362,"url":363,"label":364,"formula":365,"spacegroup":356,"year":305},7264,"\u002Fcif\u002F7264.cif","Secco 2002","Si2 (Cr.478 V.428 Mg.056 Al.033 Ti.003 Fe.001 Mn.001) (Ca.055 Na.945) O6",{"id":367,"url":368,"label":369,"formula":370,"spacegroup":356,"year":279},7265,"\u002Fcif\u002F7265.cif","Cameron 1973","Si2 Cr Na O6",[372,373,374,375,376],"Chrome-Acmite","Cloromelanitite","Cosmochlore","IMA1965-007","Ureyite",[378,382,386,390,394,399,403,407,411,414,418,422],{"lang":379,"names":380},"ca",[381],"cosmoclor",{"lang":383,"names":384},"de",[385,7],"IMA 1965-007",{"lang":387,"names":388},"eu",[389],"Kosmokloro",{"lang":391,"names":392},"fr",[393,373,374,7,376],"Chrome-acmite",{"lang":395,"names":396},"hu",[397,398],"kosmoklor","Kozmoklor",{"lang":400,"names":401},"it",[402,7],"Cosmocloro",{"lang":404,"names":405},"ja",[406],"コスモクロア輝石",{"lang":408,"names":409},"nl",[410],"Kosmochloor",{"lang":412,"names":413},"pt",[375],{"lang":415,"names":416},"ru",[417],"Космохлор",{"lang":419,"names":420},"ta",[375,421],"காசுமோகுளோர்",{"lang":423,"names":424},"uk",[417,425],"Юріїт","Q1983903",{"history":11,"applications":11}]