[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:6683":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":8,"polytypeof":8,"groupid":8,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":8,"mindat_formula_note":8,"ima_formula":8,"elements":8,"sigelements":8,"key_elements":8,"impurities":8,"cim":8,"ima_status":8,"ima_notes":8,"ima_history":8,"approval_year":8,"publication_year":8,"discovery_year":8,"strunz10ed1":14,"strunz10ed2":14,"strunz10ed3":14,"strunz10ed4":8,"dana8ed1":14,"dana8ed2":14,"dana8ed3":14,"dana8ed4":14,"csystem":8,"cclass":8,"spacegroup":8,"spacegroupset":14,"a":14,"b":14,"c":14,"alpha":14,"beta":14,"gamma":14,"aerror":8,"berror":8,"cerror":8,"alphaerror":8,"betaerror":8,"gammaerror":8,"va3":8,"z":8,"csmetamict":13,"commentcrystal":8,"twinning":8,"tranglide":8,"parting":8,"epitaxidescription":8,"morphology":8,"tlform":8,"hmin":8,"hmax":8,"hardtype":8,"vhnmin":14,"vhnmax":14,"vhnerror":8,"vhng":8,"vhns":8,"commenthard":8,"dmeas":14,"dmeas2":14,"dcalc":14,"dmeaserror":8,"dcalcerror":8,"commentdense":8,"lustre":8,"lustretype":8,"commentluster":8,"diapheny":8,"streak":8,"colour":8,"commentcolor":8,"colors":8,"streak_colors":8,"luminescence":8,"uv":8,"cleavage":8,"cleavagetype":8,"fracturetype":8,"tenacity":8,"commentbreak":8,"opticaltype":8,"opticalsign":8,"opticalalpha":14,"opticalalpha2":14,"opticalalphaerror":8,"opticalbeta":14,"opticalbeta2":14,"opticalbetaerror":8,"opticalgamma":14,"opticalgamma2":14,"opticalgammaerror":8,"opticalomega":14,"opticalomega2":14,"opticalomegaerror":8,"opticalepsilon":14,"opticalepsilon2":14,"opticalepsilonerror":8,"opticaln":14,"opticaln2":14,"opticalnerror":8,"optical2vcalc":14,"optical2vcalc2":14,"optical2vcalcerror":8,"optical2vmeasured":14,"optical2vmeasured2":14,"optical2vmeasurederror":8,"rimin":8,"rimax":8,"opticaldispersion":8,"opticalpleochroism":8,"opticalpleochorismdesc":8,"opticalbirefringence":8,"opticalcomments":8,"opticalcolour":8,"opticalinternal":8,"opticaltropic":8,"opticalanisotropism":8,"opticalbireflectance":8,"opticalextinction":8,"opticalr":8,"specdispm":8,"ir":8,"electrical":8,"magnetism":8,"thermalbehaviour":8,"other":8,"industrial":8,"occurrence":8,"otheroccurrence":8,"type_specimen_store":8,"description_short":8,"aboutname":15,"rock_parent":8,"rock_parent2":8,"rock_root":16,"rock_bgs_code":8,"meteoritical_code":8,"updttime":17,"reviewed_at":8,"variety_of":8,"varieties":18,"group_members":26,"associates":27,"confused_with":28,"type_localities":29,"occurrence_total":30,"citations":31,"images":56,"structures":86,"synonyms":87,"language_names":93,"wikidata_qid":8,"texts":94},6683,"1:1:6683:5","f6836d36-6ef1-41ad-aea7-07eba2ca87ff","Perthite",null,2,"variety",1624,1664,false,"0","Named for the nearby city of Perth in Ontario. The type locality is 6 miles (approx 9.5 km) southwest of Perth.",0,"2025-08-11 12:14:27",[19,22],{"id":20,"name":21,"entrytype":9,"csystem":8,"ima_formula":8,"mindat_formula":8,"hmin":8,"hmax":8,"dmeas":14,"dcalc":14,"primary_image_id":8},9001,"Cryptoperthite",{"id":23,"name":24,"entrytype":9,"csystem":8,"ima_formula":8,"mindat_formula":8,"hmin":8,"hmax":8,"dmeas":8,"dcalc":8,"primary_image_id":25},50410,"Mesoperthite",67092,[],[],[],[],1214,[32,36,41,46,51],{"id":33,"year":34,"html":35,"doi":8},16130069,1971,"Bachinski, S.W. and Müller, G. (1971) Experimental determinations of the microcline-low albite solvus. Journal of Petrology: 12: 329-356.",{"id":37,"year":38,"html":39,"doi":40},75602,1984,"Brown, William L., Parsons, Ian (1984) The nature of potassium feldspar, exsolution microtextures and development of dislocations as a function of composition in perthitic alkali feldspars. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  86 (4) 335-341 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01187138'>doi:10.1007\u002Fbf01187138\u003C\u002Fa>","10.1007\u002Fbf01187138",{"id":42,"year":43,"html":44,"doi":45},76476,1990,"Worden, Richard H., Walker, F. David L., Parsons, Ian, Brown, William L. (1990) Development of microporosity, diffusion channels and deuteric coarsening in perthitic alkali feldspars. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  104 (5) 507-515 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00306660'>doi:10.1007\u002Fbf00306660\u003C\u002Fa>","10.1007\u002Fbf00306660",{"id":47,"year":48,"html":49,"doi":50},77050,1994,"Waldron, K., Lee, M. R., Parsons, I. (1994) The microstructures of perthitic alkali feldspars revealed by hydrofluoric acid etching. \u003Ci>Contributions to Mineralogy and Petrology\u003C\u002Fi>,  116 (3) 360-364 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00306504'>doi:10.1007\u002Fbf00306504\u003C\u002Fa>","10.1007\u002Fbf00306504",{"id":52,"year":53,"html":54,"doi":55},345620,1995,"Lee, Martin R., Parsons, Ian (1995) Microtextural controls of weathering of perthitic alkali feldspars. \u003Ci>Geochimica et Cosmochimica Acta\u003C\u002Fi>,  59 (21) 4465-4488 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0016-7037(95)00255-x'>doi:10.1016\u002F0016-7037(95)00255-x\u003C\u002Fa>","10.1016\u002F0016-7037(95)00255-x",[57,67,76],{"id":58,"source_url":59,"license_code":60,"credit_html":61,"title":62,"description":63,"author":64,"original_width":65,"original_height":66},33354,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1118343","Public domain","No machine-readable author provided. Omphacite~commonswiki assumed (based on copyright claims)., via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=1118343\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Perthite 0.4mm.jpg","Perthite. Image taken of grain in thin section with a polarizing microscope and with a first order red compensator in the light path. Long dimension of image is 0.4 mm. The K-feldspar host appears orange, and albite exsolution lamellae appear yellow.","No machine-readable author provided. Omphacite~commonswiki assumed (based on copyright claims).",665,496,{"id":68,"source_url":69,"license_code":60,"credit_html":70,"title":71,"description":72,"author":73,"original_width":74,"original_height":75},33356,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10519592","Jstuby at English Wikipedia, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10519592\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Perthitic feldspar Dan Patch SD.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPerthite\" class=\"extiw\" title=\"w:Perthite\">Perthite\u003C\u002Fa> Feldspar from Dan Patch \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002Fpegmatite\" class=\"extiw\" title=\"w:pegmatite\">pegmatite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBlack_Hills\" class=\"extiw\" title=\"w:Black Hills\">Black Hills\u003C\u002Fa>, South Dakota.  Collected June 6, 1997 during Penn State's Geology Field Camp.  Collection designation is \u003Ci>dp2\u003C\u002Fi>.","Jstuby at English Wikipedia",540,390,{"id":77,"source_url":78,"license_code":79,"credit_html":80,"title":81,"description":82,"author":83,"original_width":84,"original_height":85},73446,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165241568","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165241568\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Perthite feldspar 1.jpg","(Karl E. Limper Geology Museum collection, Miami University, Oxford, Ohio, USA)\n\u003Chr>\n\u003Cp>The feldspar mass seen here is from a pegmatite, an intrusive igneous rock having crystals greater than 1 centimeter in size.  Most pegmatites by cooling of water-rich, felsic magma.  Dominant minerals in pegmatites are quartz, feldspar, and mica.  Unusual minerals can be common in pegmatites, such as tourmaline, beryl, and uraninite.  This specimen is perthite feldspar, which refers to closely-intergrown potassium feldspar (KAlSi3O8) and sodium feldspar (NaAlSi3O8).\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Exhibit info.:\n\u003C\u002Fp>\u003Cp>Perthite (Single Crystal)\nLocality Unknown\n\u003C\u002Fp>\u003Cp>Perthite is a complexly layered intergrowth of two alkali feldspars, one rich in potassium and the other rich in sodium.  Although originally part of the same crystal, the two feldspars separated during cooling due to incompatibilities between their respective crystal structures at lower temperatures.\n\u003C\u002Fp>\n\u003Chr>","James St. John",2590,2046,[],[88,89,90,91,92],"Anperthit","Anperthita","Anperthite","Perthit","Perthita",[],{"history":8,"applications":8}]