[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:3264":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":15,"elements":16,"sigelements":20,"key_elements":11,"impurities":11,"cim":21,"ima_status":22,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":25,"discovery_year":26,"strunz10ed1":27,"strunz10ed2":28,"strunz10ed3":29,"strunz10ed4":30,"dana8ed1":31,"dana8ed2":32,"dana8ed3":33,"dana8ed4":27,"csystem":34,"cclass":35,"spacegroup":36,"spacegroupset":37,"a":38,"b":39,"c":40,"alpha":39,"beta":39,"gamma":39,"aerror":41,"berror":11,"cerror":42,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":43,"csmetamict":14,"commentcrystal":11,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":44,"tlform":45,"hmin":46,"hmax":47,"hardtype":11,"vhnmin":39,"vhnmax":39,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":48,"dmeas2":49,"dcalc":50,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":51,"commentluster":52,"diapheny":53,"streak":54,"colour":55,"commentcolor":11,"colors":56,"streak_colors":60,"luminescence":11,"uv":11,"cleavage":61,"cleavagetype":62,"fracturetype":11,"tenacity":63,"commentbreak":11,"opticaltype":64,"opticalsign":65,"opticalalpha":39,"opticalalpha2":39,"opticalalphaerror":11,"opticalbeta":39,"opticalbeta2":39,"opticalbetaerror":11,"opticalgamma":39,"opticalgamma2":39,"opticalgammaerror":11,"opticalomega":66,"opticalomega2":39,"opticalomegaerror":11,"opticalepsilon":67,"opticalepsilon2":39,"opticalepsilonerror":11,"opticaln":39,"opticaln2":39,"opticalnerror":11,"optical2vcalc":39,"optical2vcalc2":39,"optical2vcalcerror":11,"optical2vmeasured":39,"optical2vmeasured2":39,"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":70,"other":71,"industrial":11,"occurrence":72,"otheroccurrence":11,"type_specimen_store":73,"description_short":74,"aboutname":75,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":76,"reviewed_at":11,"variety_of":11,"varieties":77,"group_members":78,"associates":112,"confused_with":113,"type_localities":114,"occurrence_total":121,"citations":122,"images":163,"structures":223,"synonyms":252,"language_names":258,"wikidata_qid":317,"texts":318},3264,"1:1:3264:9","4d9d1c27-74e2-45cb-b661-212340e10456","Portlandite","Por",0,"mineral",null,29278,561,false,"Ca(OH)\u003Csub>2\u003C\u002Fsub>",[17,18,19],"Ca","O","H",[17,18,19],"7.4.12",[23,24],"APPROVED","GRANDFATHERED",1933,"1933","4","F","E","05","6","2","1","Trigonal",13,97,"P-3m1 ","3.589","0","4.911",8,14,1,"Minute hexagonal plates. Tabular {0001}, with\u003Cmi> {10_10}\u003C\u002Fmi> as linear faces (artificial material). fibrous, powdery, massive.","Microscopic euhedral crystals in cavities.",2,3,"2.227","2.233","2.26","Pearly","Pearly on cleavages.","Transparent","White","Colorless, white to greenish white",[57,58,59],"colorless","white","green",[58],"{0001}","Perfect","sectile","Uniaxial","-","1.575","1.547",1.547,1.575,"In a closed tube it gives off water.","Portlandite is slightly water soluble (~1.73 g\u002FL at 20°C), yielding a high pH solution. Portlandite is also soluble in acids and in glycerin; however, it is insoluble in ethanol.\r\n\r\nReacts with clove oil a being gradually stained yellow; the oil itself also develops a yellowish tint. Portlandite is unaffected by mixtures of cedar-wood oil and a-monobromonaphthalene.","Alteration product of calcium silicates in larnite-spurrite contact metamorphic rocks.","The Natural History Museum, London, England, 1933,307.","Rare in nature, but an important phase in cement materials and concrete. Indicative of a very high pH value.","In allusion to the occurrence of Ca(OH)2 as a product of hydration of portland cement.","2025-10-31 17:00:21",[],[79,89,97,105],{"id":80,"name":81,"entrytype":9,"csystem":34,"ima_formula":82,"mindat_formula":83,"hmin":84,"hmax":85,"dmeas":86,"dcalc":87,"primary_image_id":88},180,"Amakinite","Fe(OH)\u003Csub>2\u003C\u002Fsub>","Fe\u003Csup>2+\u003C\u002Fsup>(OH)\u003Csub>2\u003C\u002Fsub>",3.5,4,"2.925","2.74",1034,{"id":90,"name":91,"entrytype":9,"csystem":34,"ima_formula":92,"mindat_formula":92,"hmin":93,"hmax":47,"dmeas":94,"dcalc":95,"primary_image_id":96},820,"Brucite","Mg(OH)\u003Csub>2\u003C\u002Fsub>",2.5,"2.39","2.368",4064,{"id":98,"name":99,"entrytype":9,"csystem":34,"ima_formula":100,"mindat_formula":101,"hmin":93,"hmax":47,"dmeas":102,"dcalc":103,"primary_image_id":104},3317,"Pyrochroite","Mn\u003Csup>2+\u003C\u002Fsup>(OH)\u003Csub>2\u003C\u002Fsub>","Mn(OH)\u003Csub>2\u003C\u002Fsub>","3.23","3.25",30550,{"id":106,"name":107,"entrytype":9,"csystem":34,"ima_formula":108,"mindat_formula":108,"hmin":84,"hmax":84,"dmeas":109,"dcalc":110,"primary_image_id":111},3936,"Theophrastite","Ni(OH)\u003Csub>2\u003C\u002Fsub>","4.00","3.95",24050,[],[],[115],{"id":116,"txt":117,"latitude":118,"longitude":119,"country":120},2452,"Scawt Hill, Larne, County Antrim, Northern Ireland, UK",54.9105046,-5.9153825,"UK",54,[123,127,131,135,139,144,149,153,158],{"id":124,"year":25,"html":125,"doi":126},7168,"Tilleu, C. E. (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  23 (142) 419-420 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1933.023.142.04'>doi:10.1180\u002Fminmag.1933.023.142.04\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_23\u002F23-142-419.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1933.023.142.04",{"id":128,"year":129,"html":130,"doi":11},16114047,1934,"Foshag, W.F. (1934) New mineral names. American Mineralogist, 19, 35-36.",{"id":132,"year":133,"html":134,"doi":11},1118651,1944,"Palache, Charles, Berman, Harry, Frondel, Clifford (1944) \u003Ci>The System of Mineralogy\u003C\u002Fi> (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.",{"id":136,"year":137,"html":138,"doi":11},525189,1969,"Bloss, F. Donald (1969) Indexing powder patterns for cubic materials. \u003Ci>American Mineralogist\u003C\u002Fi>,  54 (5-6) 924-930 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM54\u002FAM54_924.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":140,"year":141,"html":142,"doi":143},3619,1984,"Neal, Colin, Stanger, Gordon (1984) Calcium and magnesium hydroxide precipitation from alkaline groundwaters in Oman, and their significance to the process of serpentinization. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  48 (347) 237-241 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1984.048.347.07'>doi:10.1180\u002Fminmag.1984.048.347.07\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_48\u002F48-347-237.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1984.048.347.07",{"id":145,"year":146,"html":147,"doi":148},579390,1987,"Chaix-Pluchery, O., Pannetier, J., Bouillot, J., Niepce, J.C. (1987) Structural prereactional transformations in Ca(OH)2. \u003Ci>Journal of Solid State Chemistry\u003C\u002Fi>,  67. 225-234 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0022-4596(87)90358-6'>doi:10.1016\u002F0022-4596(87)90358-6\u003C\u002Fa>","10.1016\u002F0022-4596(87)90358-6",{"id":150,"year":151,"html":152,"doi":11},16966788,2005,"(2005) Portlandite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fportlandite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":154,"year":155,"html":156,"doi":157},153335,2007,"Xu, Hongwu, Zhao, Yusheng, Zhang, Jianzhong, Hickmott, Donald D., Daemen, Luke L. (2007) In situ neutron diffraction study of deuterated portlandite Ca(OD)2 at high pressure and temperature. \u003Ci>Physics and Chemistry of Minerals\u003C\u002Fi>,  34 (4) 223-232 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00269-007-0141-2'>doi:10.1007\u002Fs00269-007-0141-2\u003C\u002Fa>","10.1007\u002Fs00269-007-0141-2",{"id":159,"year":160,"html":161,"doi":162},397311,2013,"Iizuka, R., Yagi, T., Komatsu, K., Gotou, H., Tsuchiya, T., Kusaba, K., Kagi, H. (2013) Crystal structure of the high-pressure phase of calcium hydroxide, portlandite: In situ powder and single-crystal X-ray diffraction study. \u003Ci>American Mineralogist\u003C\u002Fi>,  98 (8) 1421-1428 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam.2013.4386'>doi:10.2138\u002Fam.2013.4386\u003C\u002Fa>","10.2138\u002Fam.2013.4386",[164,174,181,191,200,209,217],{"id":165,"source_url":166,"license_code":167,"credit_html":168,"title":169,"description":170,"author":171,"original_width":172,"original_height":173},19801,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=63693746","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=63693746\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite-526576.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPortlandite\" class=\"extiw\" title=\"en:Portlandite\">Portlandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa\u003C\u002Fdd>\n\u003Cdd>Dimentions: 11 cm x 11 cm x 3.2 cm\u003C\u002Fdd>\n\u003Cdd>Portlandite is a Calcium Hydroxide that occurs very seldom in nature, making this cabinet specimen one of phenomenal richness and rarity. There are literally hundreds of bone-white Portlandite blades up to .5 cm covering the matrix along with various other associated minerals. Large and rich. Ex. Charlie Key specimen.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",752,687,{"id":175,"source_url":176,"license_code":167,"credit_html":177,"title":178,"description":179,"author":171,"original_width":180,"original_height":173},19802,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=63694035","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=63694035\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite-535959.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPortlandite\" class=\"extiw\" title=\"en:Portlandite\">Portlandite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa\u003C\u002Fdd>\n\u003Cdd>Dimentions: 3.2 cm x 2.6 cm x 1.1 cm\u003C\u002Fdd>\n\u003Cdd>An exceptional miniature of Portlandite, which is a Calcium Hydroxide that occurs very seldom in nature. There are dozens of bone-white Portlandite blades up to 6 mm covering the matrix. The richness and rarity of this piece make it superb. Ex. Charlie Key specimen.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",840,{"id":182,"source_url":183,"license_code":184,"credit_html":185,"title":186,"description":187,"author":188,"original_width":189,"original_height":190},19803,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84862038","CC BY 4.0","Kristjan Leben, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84862038\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandiit põlevkivituhas.jpg","SEM photo of hexagonal portlandite crystals in oil shale ash sediments.","Kristjan Leben",1024,768,{"id":192,"source_url":193,"license_code":184,"credit_html":194,"title":195,"description":196,"author":197,"original_width":198,"original_height":199},19805,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=140333867","Henk Smeets - Tomeik Minerals, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=140333867\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite2355-1-tomeik-minerals.jpg","Portlandite crystals from Eifel, Bellerberg, Germany. FOV 1mm.","Henk Smeets - Tomeik Minerals",1920,1280,{"id":201,"source_url":202,"license_code":167,"credit_html":203,"title":204,"description":205,"author":206,"original_width":207,"original_height":208},19798,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326363","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326363\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite, Ettringite - Mineralogisches Museum Bonn.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPortlandite\" class=\"extiw\" title=\"en:Portlandite\">Portlandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Ettringer Feld, Kro. Mayen, Eifel, Germany\u003C\u002Fdd>\n\u003Cdd>Exposed in the Mineralogical Museum of University Bonn, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Ra'ike",2851,2563,{"id":210,"source_url":211,"license_code":167,"credit_html":212,"title":213,"description":214,"author":206,"original_width":215,"original_height":216},19799,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326536","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326536\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite, Sturmanite - Mineralogisches Museum Bonn2.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPortlandite\" class=\"extiw\" title=\"en:Portlandite\">Portlandite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSturmanite\" class=\"extiw\" title=\"en:Sturmanite\">Sturmanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning Mine, Kalahari, Southafrica\u003C\u002Fdd>\n\u003Cdd>Exposed in the Mineralogical Museum of University Bonn, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",2646,2187,{"id":218,"source_url":219,"license_code":167,"credit_html":220,"title":221,"description":214,"author":206,"original_width":222,"original_height":133},19800,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326544","Ra'ike, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=22326544\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Portlandite, Sturmanite - Mineralogisches Museum Bonn1.jpg",2456,[224,230,236,241,247],{"id":225,"url":226,"label":227,"formula":228,"spacegroup":229,"year":160},11424,"\u002Fcif\u002F11424.cif","Iizuka 2013","Ca (O2 H2)","I 1 2 1",{"id":231,"url":232,"label":233,"formula":234,"spacegroup":235,"year":155},11425,"\u002Fcif\u002F11425.cif","Xu 2007","Ca O2 D2","P -3 m 1",{"id":237,"url":238,"label":239,"formula":228,"spacegroup":235,"year":240},11434,"\u002Fcif\u002F11434.cif","Nagai 2000",2000,{"id":242,"url":243,"label":244,"formula":245,"spacegroup":235,"year":246},11440,"\u002Fcif\u002F11440.cif","Desgranges 1993 · O2 H2 Ca","O2 H2 Ca",1993,{"id":248,"url":249,"label":250,"formula":251,"spacegroup":235,"year":246},11442,"\u002Fcif\u002F11442.cif","Desgranges 1993 · O2 H1.998 Ca","O2 H1.998 Ca",[253,254,255,256,257],"Gelöschter Kalk","Hydratkalk","Kalkhydrat","Löschkalk","Portlandiet",[259,263,267,271,274,278,281,284,289,293,296,300,304,307,310,313],{"lang":260,"names":261},"ca",[262],"portlandita",{"lang":264,"names":265},"de",[266],"Portlandit",{"lang":268,"names":269},"es",[270],"Portlandita",{"lang":272,"names":273},"eu",[270],{"lang":275,"names":276},"fa",[277],"پرتلندایت",{"lang":279,"names":280},"fr",[7],{"lang":282,"names":283},"it",[7],{"lang":285,"names":286},"ja",[287,288],"ポートランダイト","ポートランド石",{"lang":290,"names":291},"nb",[292],"portlanditt",{"lang":294,"names":295},"nn",[292],{"lang":297,"names":298},"pl",[299],"Portlandyt",{"lang":301,"names":302},"ru",[303],"Портландит",{"lang":305,"names":306},"sl",[266],{"lang":308,"names":309},"uk",[303],{"lang":311,"names":312},"vi",[266],{"lang":314,"names":315},"zh",[316],"羟钙石","Q301805",{"history":11,"applications":11}]