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Cotype material is deposited in the collections of the Natural History Museum of Los Angeles County, California, USA, catalogue number 64.","A pyroxenoid closely related to the Pectolite-Sérandite Series. Barrydawsonite-(Y) is related to pectolite by the substitution ½[NaM3+Ca−2] (M3+ = Y,REE), and the only member of the wollastonite group that has the structure of the monoclinic M2abc poly...","Name is for Professor John Barry Dawson (19 June 1932 - 2 February 2013, Edinburgh, Scotland), an eminent British petrologist who made ground-breaking studies of silica undersaturated rocks of the Earth’s crust and mantle. He was particularly well-known for his discovery of the world’s only active carbonatite volcano, Oldoinyo Lengai (Tanzania). Over his career he worked at the Tanganyika Geological Survey, and the universities of St Andrews, Sheffield, and Edinburgh. Prof. Dawson also had a long association with the International Kimberlite Conferences, of which he was a co-founder.","2025-08-11 12:15:13",[],[71,82,89,97,104,110,116,123,128,135,140,147],{"id":72,"name":73,"entrytype":9,"csystem":74,"ima_formula":75,"mindat_formula":76,"hmin":77,"hmax":78,"dmeas":79,"dcalc":80,"primary_image_id":81},809,"Bustamite","Triclinic","Mn\u003Csub>2\u003C\u002Fsub>Ca\u003Csub>2\u003C\u002Fsub>MnCa(Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>","CaMn\u003Csup>2+\u003C\u002Fsup>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>)",5.5,6.5,"3.32","3.421",4198,{"id":83,"name":84,"entrytype":9,"csystem":74,"ima_formula":85,"mindat_formula":85,"hmin":86,"hmax":77,"dmeas":34,"dcalc":87,"primary_image_id":88},914,"Cascandite","CaScSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)",4.5,"3 . 0 3",4822,{"id":90,"name":91,"entrytype":9,"csystem":74,"ima_formula":92,"mindat_formula":92,"hmin":93,"hmax":93,"dmeas":94,"dcalc":95,"primary_image_id":96},52916,"Dalnegorskite","Ca\u003Csub>5\u003C\u002Fsub>Mn(Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>",6,"3.02","3.035",6803,{"id":98,"name":99,"entrytype":9,"csystem":74,"ima_formula":100,"mindat_formula":101,"hmin":93,"hmax":93,"dmeas":102,"dcalc":102,"primary_image_id":103},1511,"Ferrobustamite","CaFe\u003Csup>2+\u003C\u002Fsup>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>","CaFe\u003Csup>2+\u003C\u002Fsup>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>)","3.09",8761,{"id":105,"name":106,"entrytype":9,"csystem":74,"ima_formula":107,"mindat_formula":107,"hmin":11,"hmax":11,"dmeas":11,"dcalc":108,"primary_image_id":109},46105,"Mendigite","Mn\u003Csub>2\u003C\u002Fsub>Mn\u003Csub>2\u003C\u002Fsub>MnCa(Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>","3.56",15854,{"id":111,"name":112,"entrytype":9,"csystem":74,"ima_formula":113,"mindat_formula":114,"hmin":86,"hmax":36,"dmeas":115,"dcalc":11,"primary_image_id":11},50465,"Murakamiite","Ca\u003Csub>2\u003C\u002Fsub>LiSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)","LiCa\u003Csub>2\u003C\u002Fsub>Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)","2.86",{"id":117,"name":118,"entrytype":9,"csystem":74,"ima_formula":119,"mindat_formula":119,"hmin":86,"hmax":36,"dmeas":120,"dcalc":121,"primary_image_id":122},3141,"Pectolite","NaCa\u003Csub>2\u003C\u002Fsub>Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)","2.84","2.87",18967,{"id":124,"name":125,"entrytype":9,"csystem":74,"ima_formula":126,"mindat_formula":126,"hmin":36,"hmax":36,"dmeas":11,"dcalc":102,"primary_image_id":127},44010,"Schizolite","NaCaMnSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)",30683,{"id":129,"name":130,"entrytype":9,"csystem":74,"ima_formula":131,"mindat_formula":131,"hmin":36,"hmax":77,"dmeas":132,"dcalc":133,"primary_image_id":134},3622,"Serandite","NaMn\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)","3.34","3.42",22116,{"id":136,"name":137,"entrytype":9,"csystem":74,"ima_formula":138,"mindat_formula":138,"hmin":36,"hmax":77,"dmeas":11,"dcalc":139,"primary_image_id":11},32664,"Tanohataite","LiMn\u003Csub>2\u003C\u002Fsub>Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(OH)","3.33",{"id":141,"name":142,"entrytype":9,"csystem":74,"ima_formula":143,"mindat_formula":144,"hmin":86,"hmax":86,"dmeas":145,"dcalc":146,"primary_image_id":11},4192,"Vistepite","Mn\u003Csub>4\u003C\u002Fsub>SnB\u003Csub>2\u003C\u002Fsub>O\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","SnMn\u003Csub>4\u003C\u002Fsub>B\u003Csub>2\u003C\u002Fsub>Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>16\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","3.67","3.70",{"id":148,"name":149,"entrytype":9,"csystem":74,"ima_formula":150,"mindat_formula":151,"hmin":86,"hmax":36,"dmeas":115,"dcalc":152,"primary_image_id":153},4323,"Wollastonite","CaSiO\u003Csub>3\u003C\u002Fsub>","Ca\u003Csub>3\u003C\u002Fsub>(Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>)","2.90",28196,[],[],[157],{"id":158,"txt":159,"latitude":160,"longitude":161,"country":162},263083,"Merlot Claim, North Red Wine Pluton, Labrador, Newfoundland and Labrador, Canada",54.1336111,-62.5438889,"Canada",[164,168,172],{"id":165,"year":29,"html":166,"doi":167},244562,"Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC), CNMNC Newsletter No. 22. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  78 (5) 1241-1248 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2014.078.5.10'>doi:10.1180\u002Fminmag.2014.078.5.10\u003C\u002Fa>","10.1180\u002Fminmag.2014.078.5.10",{"id":169,"year":30,"html":170,"doi":171},244661,"Mitchell, R. H., Welch, M. D., Kampf, A. R., Chakhmouradian, A. K., Spratt, J. (2015) Barrydawsonite-(Y), Na\u003Csub>1.5\u003C\u002Fsub>CaY\u003Csub>0.5\u003C\u002Fsub>Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>H: a new pyroxenoid of the pectolite–serandite group. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  79 (3) 671-686 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2015.079.3.12'>doi:10.1180\u002Fminmag.2015.079.3.12\u003C\u002Fa>","10.1180\u002Fminmag.2015.079.3.12",{"id":173,"year":174,"html":175,"doi":11},16963118,2016,"(2016) Barrydawsonite-(Y). \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fhandbookofmineralogy.org\u002Fpdfs\u002Fbarrydawsonite%E2%80%91Y.pdf' class='refpdflink'>\u003C\u002Fa>",[],[178],{"id":179,"url":180,"label":181,"formula":182,"spacegroup":183,"year":30},1253,"\u002Fcif\u002F1253.cif","Mitchell 2015","Ca.74 Na1.54 Mn.15 Fe.07 Y.38 Nd.01 Sm.01 Gd.02 Tb.01 Dy.04 Ho.01 Er.02 Yb.01 Si3 O9 H","P 1 21\u002Fa 1",[185,186],"Barrydawsoniet-(Y)","IMA2014-042",[188,193,198,202,206],{"lang":189,"names":190},"ca",[191,192],"Barrydawsonita-","barrydawsonita-(Y)",{"lang":194,"names":195},"de",[196,197],"Barrydawsonit-(Y)","IMA 2014-042",{"lang":199,"names":200},"eu",[191,201],"Barrydawsonita-(Y)",{"lang":203,"names":204},"it",[205],"barrydawsonite-(Y)",{"lang":207,"names":208},"ru",[209],"барридоусонит-(Y)","Q19810659",{"history":11,"applications":11}]