[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:70":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":16,"elements":17,"sigelements":22,"key_elements":11,"impurities":11,"cim":23,"ima_status":24,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":11,"discovery_year":11,"strunz10ed1":27,"strunz10ed2":28,"strunz10ed3":28,"strunz10ed4":29,"dana8ed1":30,"dana8ed2":31,"dana8ed3":32,"dana8ed4":32,"csystem":33,"cclass":34,"spacegroup":35,"spacegroupset":36,"a":37,"b":36,"c":38,"alpha":36,"beta":36,"gamma":36,"aerror":39,"berror":11,"cerror":40,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":40,"csmetamict":14,"commentcrystal":41,"twinning":42,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":43,"tlform":11,"hmin":44,"hmax":45,"hardtype":11,"vhnmin":36,"vhnmax":36,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":46,"dmeas2":46,"dcalc":47,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":48,"commentluster":11,"diapheny":49,"streak":50,"colour":51,"commentcolor":52,"colors":53,"streak_colors":59,"luminescence":11,"uv":11,"cleavage":60,"cleavagetype":61,"fracturetype":62,"tenacity":63,"commentbreak":11,"opticaltype":64,"opticalsign":65,"opticalalpha":36,"opticalalpha2":36,"opticalalphaerror":11,"opticalbeta":36,"opticalbeta2":36,"opticalbetaerror":11,"opticalgamma":36,"opticalgamma2":36,"opticalgammaerror":11,"opticalomega":66,"opticalomega2":36,"opticalomegaerror":11,"opticalepsilon":67,"opticalepsilon2":36,"opticalepsilonerror":11,"opticaln":36,"opticaln2":36,"opticalnerror":11,"optical2vcalc":36,"optical2vcalc2":36,"optical2vcalcerror":11,"optical2vmeasured":36,"optical2vmeasured2":36,"optical2vmeasurederror":11,"rimin":68,"rimax":69,"opticaldispersion":11,"opticalpleochroism":11,"opticalpleochorismdesc":11,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":11,"otheroccurrence":70,"type_specimen_store":71,"description_short":72,"aboutname":73,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":74,"reviewed_at":11,"variety_of":11,"varieties":75,"group_members":76,"associates":134,"confused_with":190,"type_localities":191,"occurrence_total":192,"citations":193,"images":309,"structures":364,"synonyms":391,"language_names":398,"wikidata_qid":442,"texts":443},70,"1:1:70:9","eb6225fb-775a-447c-83a1-fbf9d98d30a3","Åkermanite","Åk",0,"mineral",null,29310,257,false,"Ca\u003Csub>2\u003C\u002Fsub>Mg[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]","Ca\u003Csub>2\u003C\u002Fsub>MgSi\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>",[18,19,20,21],"Ca","Mg","Si","O",[18,19,20,21],"14.6.9",[25,26],"APPROVED","GRANDFATHERED","9","B","10","55","4","1","Tetragonal",24,146,"0","7.8288","5.0052",8,2,"Synthetic material","On \u003Cmi>{100}\u003C\u002Fmi> and \u003Cmi>001 \u003C\u002Fmi>, cruciform.","Crystals short prismatic to thin tabular, which may resemble squashed, octahedrally-modified cubes; granular, massive.",5,6,"2.944","2.922","Vitreous,Resinous","Transparent,Translucent","White","Colorless, yellowish gray, green, brown","In thin section, colorless to yellow.",[54,55,56,57,58],"colorless","gray","green","brown","white",[58],"Distinct on \u003Cmi>{001}\u003C\u002Fmi> , poor on \u003Cmi>{110}\u003C\u002Fmi>","Distinct\u002FGood","Irregular\u002FUneven,Conchoidal","brittle","Uniaxial","+","1.632","1.64",1.632,1.64,"A product of contact metamorphism of siliceous limestones and dolostones, and in rocks of the sanidinite facies. Also forms from alkalic magmas rich in calcium.","No defined type material.","Gehlenite-Åkermanite Series.\r\n\r\nThe Mg analogue of ferroåkermanite.","First described from samples of slags from furnace iron production found at three furnace localities: \u003Cl id='228704'>Hofors\u003C\u002Fl>, Löfsjöen and Mölnbo, Sweden (Vogt 1884). Named by the Norwegian geologist, professor Johan Herman Lie Vogt (1858-1932) in honor of Anders Richard Åkerman (1837-1922), Swedish metallurgist. During his comprehensive study of the mineralogy of slag products, Vogt discovered a new Ca-Mg-silicate, and named the mineral \u003Cem>Åkermanit\u003C\u002Fem>. Åkerman had kindly given J.H.L. Vogt access to Stockholms Bergskolas large collection of slags. It was in samples from this collection Vogt discovered the mineral.","2026-05-11 14:48:17",[],[77,86,92,97,103,111,121,127],{"id":78,"name":79,"entrytype":9,"csystem":33,"ima_formula":80,"mindat_formula":81,"hmin":82,"hmax":44,"dmeas":83,"dcalc":84,"primary_image_id":85},39212,"Alumoåkermanite","(Ca,Na)\u003Csub>2\u003C\u002Fsub>(Al,Mg,Fe\u003Csup>2+\u003C\u002Fsup>)(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)","(CaNa)Al[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]",4.5,"2.96","3.00",997,{"id":87,"name":88,"entrytype":9,"csystem":33,"ima_formula":89,"mindat_formula":90,"hmin":44,"hmax":44,"dmeas":11,"dcalc":91,"primary_image_id":11},54030,"Bennesherite","Ba\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>","Ba\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]","4.39",{"id":93,"name":94,"entrytype":9,"csystem":33,"ima_formula":11,"mindat_formula":95,"hmin":82,"hmax":44,"dmeas":11,"dcalc":96,"primary_image_id":11},471953,"Ferroåkermanite","Ca\u003Csub>2\u003C\u002Fsub>Fe[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]","3.20",{"id":98,"name":99,"entrytype":9,"csystem":33,"ima_formula":100,"mindat_formula":101,"hmin":44,"hmax":45,"dmeas":36,"dcalc":36,"primary_image_id":102},1668,"Gehlenite","Ca\u003Csub>2\u003C\u002Fsub>Al(SiAl)O\u003Csub>7\u003C\u002Fsub>","Ca\u003Csub>2\u003C\u002Fsub>Al[AlSiO\u003Csub>7\u003C\u002Fsub>]",9727,{"id":104,"name":105,"entrytype":9,"csystem":33,"ima_formula":106,"mindat_formula":107,"hmin":44,"hmax":44,"dmeas":108,"dcalc":109,"primary_image_id":110},1769,"Gugiaite","Ca\u003Csub>2\u003C\u002Fsub>BeSi\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>","Ca\u003Csub>2\u003C\u002Fsub>Be[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]","3.0336","3.03",10562,{"id":112,"name":113,"entrytype":9,"csystem":33,"ima_formula":114,"mindat_formula":115,"hmin":116,"hmax":117,"dmeas":118,"dcalc":119,"primary_image_id":120},1818,"Hardystonite","Ca\u003Csub>2\u003C\u002Fsub>ZnSi\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>","Ca\u003Csub>2\u003C\u002Fsub>Zn[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]",3,4,"3.396","3.42",10854,{"id":122,"name":123,"entrytype":9,"csystem":33,"ima_formula":124,"mindat_formula":125,"hmin":44,"hmax":44,"dmeas":11,"dcalc":126,"primary_image_id":11},47040,"Hydroxylgugiaite","(Ca\u003Csub>3\u003C\u002Fsub>◻)\u003Csub>E4\u003C\u002Fsub>(Si\u003Csub>3.5\u003C\u002Fsub>Be\u003Csub>2.5\u003C\u002Fsub>)\u003Csub>E6\u003C\u002Fsub>O\u003Csub>11\u003C\u002Fsub>(OH)\u003Csub>3\u003C\u002Fsub>","(Ca,◻)\u003Csub>2\u003C\u002Fsub>(Si,Be)[(Be,Si)\u003Csub>2\u003C\u002Fsub>O\u003Csub>5.5\u003C\u002Fsub>(OH)\u003Csub>1.5\u003C\u002Fsub>]","2.79",{"id":128,"name":129,"entrytype":9,"csystem":33,"ima_formula":130,"mindat_formula":131,"hmin":132,"hmax":132,"dmeas":36,"dcalc":133,"primary_image_id":11},7202,"Okayamalite","Ca\u003Csub>2\u003C\u002Fsub>B\u003Csub>2\u003C\u002Fsub>SiO\u003Csub>7\u003C\u002Fsub>","Ca\u003Csub>2\u003C\u002Fsub>B[BSiO\u003Csub>7\u003C\u002Fsub>]",5.5,"3.30",[135,144,153,161,168,174,181],{"id":136,"name":137,"entrytype":9,"csystem":138,"ima_formula":139,"mindat_formula":139,"hmin":132,"hmax":140,"dmeas":141,"dcalc":142,"primary_image_id":143},1294,"Diopside","Monoclinic","CaMgSi\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>",6.5,"3.22","3.278",29614,{"id":145,"name":146,"entrytype":9,"csystem":147,"ima_formula":148,"mindat_formula":148,"hmin":149,"hmax":149,"dmeas":150,"dcalc":151,"primary_image_id":152},1584,"Forsterite","Orthorhombic","Mg\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)",7,"3.275","3.271",29729,{"id":154,"name":155,"entrytype":9,"csystem":138,"ima_formula":156,"mindat_formula":157,"hmin":45,"hmax":45,"dmeas":158,"dcalc":159,"primary_image_id":160},2333,"Larnite","Ca\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)","Ca\u003Csub>2\u003C\u002Fsub>SiO\u003Csub>4\u003C\u002Fsub>","3.28","3.326",80360,{"id":162,"name":163,"entrytype":9,"csystem":138,"ima_formula":164,"mindat_formula":164,"hmin":45,"hmax":45,"dmeas":165,"dcalc":166,"primary_image_id":167},2656,"Merwinite","Ca\u003Csub>3\u003C\u002Fsub>Mg(SiO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>","3.15","3.32",15931,{"id":169,"name":170,"entrytype":9,"csystem":147,"ima_formula":171,"mindat_formula":171,"hmin":44,"hmax":132,"dmeas":109,"dcalc":172,"primary_image_id":173},2768,"Monticellite","CaMg(SiO\u003Csub>4\u003C\u002Fsub>)","3.058",13377,{"id":175,"name":176,"entrytype":9,"csystem":138,"ima_formula":177,"mindat_formula":177,"hmin":44,"hmax":44,"dmeas":178,"dcalc":179,"primary_image_id":180},3734,"Spurrite","Ca\u003Csub>5\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(CO\u003Csub>3\u003C\u002Fsub>)","3.014","3.025",22690,{"id":182,"name":183,"entrytype":9,"csystem":184,"ima_formula":185,"mindat_formula":186,"hmin":82,"hmax":44,"dmeas":187,"dcalc":188,"primary_image_id":189},4323,"Wollastonite","Triclinic","CaSiO\u003Csub>3\u003C\u002Fsub>","Ca\u003Csub>3\u003C\u002Fsub>(Si\u003Csub>3\u003C\u002Fsub>O\u003Csub>9\u003C\u002Fsub>)","2.86","2.90",28196,[],[],57,[194,198,202,207,212,216,221,225,230,235,239,243,247,251,256,261,266,271,276,280,284,289,294,299,304],{"id":195,"year":196,"html":197,"doi":11},16099645,1884,"Vogt, I.H.L. (1884) Studier over slagger. I. Kongliga Svenska Vetenskaps-Akademiens Handlingar: 9: 3-302.",{"id":199,"year":200,"html":201,"doi":11},16099646,1890,"Vogt, I.H.L. (1890) Die Mineralien der Melilithgruppe - nämlich Gehlenit, Melilith und ein neues tetragonales, nicht Al2O3-führendes (Ca,Mg)O-Silikat (Åkermanit), nebst Zwischengliedern. Archiv for Mathematik og Naturvidenskab: 13: 310-402.",{"id":203,"year":204,"html":205,"doi":206},1153674,1941,"Osborn, E. F., Schairer, J. F. (1941) The ternary system pseudowollastonite-akermanite-gehlenite. \u003Ci>American Journal of Science\u003C\u002Fi>,  239 (10) 715-763 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2475\u002Fajs.239.10.715'>doi:10.2475\u002Fajs.239.10.715\u003C\u002Fa>","10.2475\u002Fajs.239.10.715",{"id":208,"year":209,"html":210,"doi":211},1153834,1942,"Schairer, J. F., Bowen, N. L. (1942) The binary system CaSiO3-diopside, and the relations between CaSiO3 and akermanite. \u003Ci>American Journal of Science\u003C\u002Fi>,  240 (10). 725-742 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2475\u002Fajs.240.10.725'>doi:10.2475\u002Fajs.240.10.725\u003C\u002Fa>","10.2475\u002Fajs.240.10.725",{"id":213,"year":214,"html":215,"doi":11},12911038,1952,"Neuvonen, K.J. (1952) Thermochemical investigation of the åkermanite-gehlenite series. \u003Ci>Bulletin de la Commission Géologique de Finlande\u003C\u002Fi> Vol. 158. Geological Survey of Finland \u003Ca target='_blank' href='https:\u002F\u002Ftupa.gtk.fi\u002Fjulkaisu\u002Fbulletin\u002Fbt_158.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":217,"year":218,"html":219,"doi":220},1155753,1956,"Harker, R. I.; Tuttle, O. F. (1956) The lower limit of stability of akermanite (Ca2MgSi2O7). \u003Ci>American Journal of Science\u003C\u002Fi>,  254 (8). 468-478 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2475\u002Fajs.254.8.468'>doi:10.2475\u002Fajs.254.8.468\u003C\u002Fa>","10.2475\u002Fajs.254.8.468",{"id":222,"year":223,"html":224,"doi":11},18420755,1962,"Christie, O.H.J. (1962) On sub solidus relations of silicates. IV. The systems åkermanite - sodium-gehlenite and gehlenite - sodium gehlenite. \u003Ci>Norsk Geologisk Tidsskrift [Norwegian Journal of Geology]\u003C\u002Fi>,  42 (1-2). 31-44 \u003Ca target='_blank' href='https:\u002F\u002Fforeninger.uio.no\u002Fngf\u002Fngt\u002Fpdfs\u002FNGT_42_1&2_031-044.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":226,"year":227,"html":228,"doi":229},265858,1970,"Dear, P.S (1970) Isomorphism of åkermanite and strontio-gehlenite. \u003Ci>Lithos\u003C\u002Fi>,  3 (1) 13-16 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0024-4937(70)90083-6'>doi:10.1016\u002F0024-4937(70)90083-6\u003C\u002Fa>","10.1016\u002F0024-4937(70)90083-6",{"id":231,"year":232,"html":233,"doi":234},6545,1972,"Christiaan de Wys, E. (1972) Additional data concerning the stability of åkermanite. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  38 (297) 635-636 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1972.038.297.18'>doi:10.1180\u002Fminmag.1972.038.297.18\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_38\u002F38-297-635.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1972.038.297.18",{"id":236,"year":237,"html":238,"doi":11},16099649,1979,"Valley, J.W., Essene, E.J. (1979) Vesuvianite, akermanite, monticellite and wollastonite equlibria and high X H2O\u002FCO2 at Cascade slide, Mt Marcy Quad, Adirondack Mts. EOS: 60: 423.",{"id":240,"year":241,"html":242,"doi":11},16099650,1981,"Kimata, M., Ii, N. (1981) The crystal structure of synthetic akermanite, Ca2MgSi2O7. Neues Jahrbuch für Mineralogie, Monatshefte: 1981: 1-10.",{"id":244,"year":241,"html":245,"doi":246},340042,"Charlu, T.V., Newton, R.C., Kleppa, O.J. (1981) Thermochemistry of synthetic Ca2Al2SiO7 (gehlenite)-Ca2MgSi2O7 (åkermanite) melilites. \u003Ci>Geochimica et Cosmochimica Acta\u003C\u002Fi>,  45 (9) 1609-1617 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0016-7037(81)90289-1'>doi:10.1016\u002F0016-7037(81)90289-1\u003C\u002Fa>","10.1016\u002F0016-7037(81)90289-1",{"id":248,"year":249,"html":250,"doi":11},16099651,1986,"Hemingway, B.S., Evans, H.T., Nord, G.L., Haselton, H.T., Robie, R.A., McGee, J.J. (1986) Åkermanite: phase transitions in heat capacity and thermal expansion, and revised thermodynamic data. The Canadian Mineralogist: 24: 425-434.",{"id":252,"year":253,"html":254,"doi":255},89497,1991,"ONUMA, KOSUKE, MORIDAIRA, HIDEYA (1991) The system diopside-akermanite-gehlenite at 1 atm. \u003Ci>Journal of Mineralogy, Petrology and Economic Geology\u003C\u002Fi>,  86 (12) 554-559 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2465\u002Fganko.86.554'>doi:10.2465\u002Fganko.86.554\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.jstage.jst.go.jp\u002Farticle\u002Fganko1988\u002F86\u002F12\u002F86_12_554\u002F_pdf' class='refpdflink'>\u003C\u002Fa>","10.2465\u002Fganko.86.554",{"id":257,"year":258,"html":259,"doi":260},152043,1992,"Swainson, Ian P., Dove, Martin T., Schmahl, Wolfgang W., Putnis, Andrew (1992) Neutron powder diffraction study of the åkermanite-gehlenite solid solution series. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  19 (3). 185-195 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00202107'>doi:10.1007\u002Fbf00202107\u003C\u002Fa>","10.1007\u002Fbf00202107",{"id":262,"year":263,"html":264,"doi":265},15008440,1997,"Kakitani, Satoru; Ishii, Hiroshi; Yamaguchi, Kazuhiro (1997) Synthesis of Solid Solutions Based on the Akermanite and\u002For Hardystonite Systems and Their Fluorescence Properties. \u003Ci>Japanese Journal of Applied Physics\u003C\u002Fi>,  36. 6793-6797 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1143\u002Fjjap.36.6793'>doi:10.1143\u002Fjjap.36.6793\u003C\u002Fa>","10.1143\u002Fjjap.36.6793",{"id":267,"year":268,"html":269,"doi":270},81961,1998,"KUSAKA, Katsuhiro, OHMASA, Masaaki, HAGIYA, Kenji, IISHI, Kazuaki, HAGA, Nobuhiko (1998) On variety of the Ca coordination in the incommensurate structure of synthetic iron-bearing åkermanite, Ca2(Mg0.55,Fe0.45)Si2O7. \u003Ci>Mineralogical Journal\u003C\u002Fi>,  20 (2). 47-58 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2465\u002Fminerj.20.47'>doi:10.2465\u002Fminerj.20.47\u003C\u002Fa>","10.2465\u002Fminerj.20.47",{"id":272,"year":273,"html":274,"doi":275},152718,2000,"Courtial, P., Téqui, C., Richet, P. (2000) Thermodynamics of diopside, anorthite, pseudowollastonite, CaMgGeO4 olivine, and åkermanite up to near the melting point. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  27 (4). 242-250 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs002690050253'>doi:10.1007\u002Fs002690050253\u003C\u002Fa>","10.1007\u002Fs002690050253",{"id":277,"year":278,"html":279,"doi":11},16962587,2001,"(2001) Åkermanite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fakermanite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":281,"year":278,"html":282,"doi":283},188425,"Bindi, Luca, Bonazzi, Paola, Dušek, Michal, Petříček, Václav, Chapuis, Gervais (2001) Five-dimensional structure refinement of natural melilite, (Ca1.89Sr0.01Na0.08K0.02)(Mg0.92Al0.08)(Si1.98Al0.02)O7. \u003Ci>Acta Crystallographica Section B Structural Science\u003C\u002Fi>,  57 (6) 739-746 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0108768101014495'>doi:10.1107\u002Fs0108768101014495\u003C\u002Fa>","10.1107\u002Fs0108768101014495",{"id":285,"year":286,"html":287,"doi":288},188268,2003,"Bindi, Luca, Rees, Leigh H., Bonazzi, Paola (2003) Twinning in natural melilite simulating a fivefold superstructure. \u003Ci>Acta Crystallographica Section B Structural Science\u003C\u002Fi>,  59 (1) 156-158 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0108768103000041'>doi:10.1107\u002Fs0108768103000041\u003C\u002Fa>","10.1107\u002Fs0108768103000041",{"id":290,"year":291,"html":292,"doi":293},153114,2004,"Haussühl, S.; Liebertz, J. (2004) Elastic and thermoelastic properties of synthetic Ca2MgSi2O7 (åkermanite) and Ca2ZnSi2O7 (hardystonite). \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  31 (8). 565-567 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00269-004-0416-9'>doi:10.1007\u002Fs00269-004-0416-9\u003C\u002Fa>","10.1007\u002Fs00269-004-0416-9",{"id":295,"year":296,"html":297,"doi":298},395649,2007,"Gemmi, M., Merlini, M., Cruciani, G., Artioli, G. (2007) Non-ideality and defectivity of the åkermanite-gehlenite solid solution: An X-ray diffraction and TEM study. \u003Ci>American Mineralogist\u003C\u002Fi>,  92 (10). 1685-1694 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam.2007.2380'>doi:10.2138\u002Fam.2007.2380\u003C\u002Fa>","10.2138\u002Fam.2007.2380",{"id":300,"year":301,"html":302,"doi":303},153411,2008,"Merlini, Marco, Gemmi, Mauro, Cruciani, Giuseppe, Artioli, Gilberto (2008) High-temperature behaviour of melilite: in situ X-ray diffraction study of gehlenite–åkermanite–Na melilite solid solution. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  35 (3) 147-155 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00269-007-0206-2'>doi:10.1007\u002Fs00269-007-0206-2\u003C\u002Fa>","10.1007\u002Fs00269-007-0206-2",{"id":305,"year":306,"html":307,"doi":308},396270,2009,"Merlini, M., Gemmi, M., Hanfland, M., Crichton, W. (2009) High-pressure behavior of akermanite and gehlenite and phase stability of the normal structure in melilites. \u003Ci>American Mineralogist\u003C\u002Fi>,  94 (5) 704-709 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam.2009.3072'>doi:10.2138\u002Fam.2009.3072\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol94\u002FAM94_704.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam.2009.3072",[310,320,330,340,350,357],{"id":311,"source_url":312,"license_code":313,"credit_html":314,"title":315,"description":316,"author":317,"original_width":318,"original_height":319},473,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130425564","CC BY 4.0","Henk Smeets – tomeikminerals.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130425564\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Åkermanite Tomeik.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002F%C3%85kermanite\" class=\"extiw\" title=\"en:Åkermanite\">Åkermanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Field of view: 2 mm\u003C\u002Fdd>\n\u003Cdd>Locality: Graulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"https:\u002F\u002Fwww.mindat.org\u002Floc-1797.html\">locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Henk Smeets – tomeikminerals.com",1920,1279,{"id":321,"source_url":322,"license_code":323,"credit_html":324,"title":325,"description":326,"author":327,"original_width":328,"original_height":329},31708,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=45341539","CC BY-SA 4.0","Perfil57, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=45341539\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Шлак медеплавильный.jpg","In a metallurgical slag under a microscope, you can see the amazing akermanite dendrites. This dendrites so reminiscent letters of an unknown alphabet , that there is a desire to decipher a mysterious text. Microscope Axioskop-40, cross-polarized light.","Perfil57",3000,2929,{"id":331,"source_url":332,"license_code":333,"credit_html":334,"title":335,"description":336,"author":337,"original_width":338,"original_height":339},474,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=151162361","Public domain","Enrico Bonacina, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=151162361\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Åkermanite-1121479.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002F%C3%85kermanite\" class=\"extiw\" title=\"en:Åkermanite\">Åkermanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Mount Somma, Metropolitan City of Naples, Campania, Italy\u003C\u002Fdd>\n\u003Cdd>Description: Field filled with åkermanite crystals, measuring more than 0.8 mm on edge, with tetragonal symmetry Olympus digital camera E-330 Specimen and photo Enrico Bonacina.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Enrico Bonacina",1024,768,{"id":341,"source_url":342,"license_code":343,"credit_html":344,"title":345,"description":346,"author":347,"original_width":348,"original_height":349},467,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466057","CC BY-SA 3.0","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466057\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Åkermanite, Calcite, Hillebrandite, Tilleyite - Mineralogisches Museum Bonn1.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002F%C3%85kermanite\" class=\"extiw\" title=\"en:Åkermanite\">Åkermanite\u003C\u002Fa> (yellowish brown), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa> (blue), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHillebrandite\" class=\"extiw\" title=\"en:Hillebrandite\">Hillebrandite\u003C\u002Fa> (variety \u003Ci>Foshagite\u003C\u002Fi>, fibrous), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTilleyite\" class=\"extiw\" title=\"en:Tilleyite\">Tilleyite\u003C\u002Fa> (mallow colored)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Crestmore, Riverside, California, USA\u003C\u002Fdd>\n\u003Cdd>Collection of Dr. Schilly, 1966 - Exposed in the Mineralogical Museum of University Bonn, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Ra'ike",2786,1862,{"id":351,"source_url":352,"license_code":343,"credit_html":353,"title":354,"description":346,"author":347,"original_width":355,"original_height":356},468,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466089","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466089\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Åkermanite, Calcite, Hillebrandite, Tilleyite - Mineralogisches Museum Bonn2.jpg",3534,2155,{"id":358,"source_url":359,"license_code":343,"credit_html":360,"title":361,"description":346,"author":347,"original_width":362,"original_height":363},469,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466161","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=20466161\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Åkermanite, Calcite, Hillebrandite, Tilleyite - Mineralogisches Museum Bonn3.jpg",3322,2342,[365,370,376,382,386],{"id":35,"url":366,"label":367,"formula":368,"spacegroup":369,"year":306},"\u002Fcif\u002F146.cif","Merlini 2009 · Mg Ca2 Si2 O7","Mg Ca2 Si2 O7","P -4 21 m",{"id":371,"url":372,"label":373,"formula":374,"spacegroup":375,"year":306},148,"\u002Fcif\u002F148.cif","Merlini 2009 · Mg Si2 Ca2 O7","Mg Si2 Ca2 O7","P 1 21\u002Fn 1",{"id":377,"url":378,"label":379,"formula":380,"spacegroup":369,"year":381},149,"\u002Fcif\u002F149.cif","Bindi 2005","Ca1.87 Na.1 Sr.02 K.02 Mg.96 Al.09 Si1.98 O7",2005,{"id":383,"url":384,"label":385,"formula":368,"spacegroup":369,"year":278},159,"\u002Fcif\u002F159.cif","Kusaka 2001",{"id":387,"url":388,"label":389,"formula":390,"spacegroup":369,"year":268},166,"\u002Fcif\u002F166.cif","Kusaka 1998","Ca2 (Mg.554 Fe.446) Si2 O7",[392,393,394,395,396,397],"Åkermaniet","Åkermanitt","Oakermanit","Oakermanite","Okermanita","Okermanite",[399,403,407,411,415,419,423,427,431,435,438],{"lang":400,"names":401},"az",[402],"Okermanit",{"lang":404,"names":405},"ca",[406],"åkermanita",{"lang":408,"names":409},"de",[410],"Åkermanit",{"lang":412,"names":413},"es",[414],"Oakermanita",{"lang":416,"names":417},"eu",[418],"akermanita",{"lang":420,"names":421},"fr",[422],"Akermanite",{"lang":424,"names":425},"he",[426],"אקרמניט",{"lang":428,"names":429},"it",[430],"åkermanite",{"lang":432,"names":433},"sk",[434],"åkermanit",{"lang":436,"names":437},"sv",[410],{"lang":439,"names":440},"uk",[441],"Акерманіт","Q270942",{"history":11,"applications":11}]