[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:1315":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":11,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":11,"ima_formula":14,"elements":15,"sigelements":18,"key_elements":19,"impurities":11,"cim":20,"ima_status":21,"ima_notes":11,"ima_history":11,"approval_year":23,"publication_year":24,"discovery_year":25,"strunz10ed1":26,"strunz10ed2":27,"strunz10ed3":28,"strunz10ed4":29,"dana8ed1":26,"dana8ed2":26,"dana8ed3":30,"dana8ed4":31,"csystem":32,"cclass":33,"spacegroup":34,"spacegroupset":35,"a":36,"b":37,"c":38,"alpha":37,"beta":37,"gamma":37,"aerror":11,"berror":11,"cerror":11,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":39,"csmetamict":13,"commentcrystal":11,"twinning":40,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":41,"tlform":42,"hmin":11,"hmax":11,"hardtype":11,"vhnmin":37,"vhnmax":37,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":37,"dmeas2":37,"dcalc":43,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":44,"lustretype":44,"commentluster":11,"diapheny":45,"streak":46,"colour":47,"commentcolor":11,"colors":48,"streak_colors":51,"luminescence":11,"uv":52,"cleavage":11,"cleavagetype":11,"fracturetype":11,"tenacity":11,"commentbreak":11,"opticaltype":53,"opticalsign":54,"opticalalpha":37,"opticalalpha2":37,"opticalalphaerror":11,"opticalbeta":37,"opticalbeta2":37,"opticalbetaerror":11,"opticalgamma":37,"opticalgamma2":37,"opticalgammaerror":11,"opticalomega":37,"opticalomega2":37,"opticalomegaerror":11,"opticalepsilon":37,"opticalepsilon2":37,"opticalepsilonerror":11,"opticaln":37,"opticaln2":37,"opticalnerror":11,"optical2vcalc":37,"optical2vcalc2":37,"optical2vcalcerror":11,"optical2vmeasured":37,"optical2vmeasured2":37,"optical2vmeasurederror":11,"rimin":11,"rimax":11,"opticaldispersion":11,"opticalpleochroism":11,"opticalpleochorismdesc":11,"opticalbirefringence":55,"opticalcomments":56,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":57,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":58,"industrial":11,"occurrence":59,"otheroccurrence":60,"type_specimen_store":61,"description_short":62,"aboutname":63,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":64,"reviewed_at":11,"variety_of":11,"varieties":65,"group_members":66,"associates":67,"confused_with":68,"type_localities":69,"occurrence_total":76,"citations":77,"images":95,"structures":106,"synonyms":117,"language_names":120,"wikidata_qid":141,"texts":142},1315,"1:1:1315:0","10db319c-a43f-40ee-8a28-bc647129b203","Downeyite","Dny",0,"mineral",null,22,false,"SeO\u003Csub>2\u003C\u002Fsub>",[16,17],"Se","O",[16,17],[16],"7.17.1",[22],"APPROVED",1974,1977,"1971","4","D","E","05","3","1","Tetragonal",27,187,"P42\u002Fmbc ","8.36","0","5.06",8,"Contact twinning","Acicular crystals to 2 cm.","Acicular to prismatic crystals","4.146","Adamantine","Transparent","White","Colourless (red - included selenium, yellow - included sulfur)",[49,50],"colorless","white",[50],"None","Uniaxial","+","Moderate","Indices of refraction are > 1.80","Parallel","Extremely hygroscopic. In air will deliquesce in a few minutes and be absorbed into substrate or evaporate leaving colorless film. Readily soluble in cold H2O, mineral acids, and acetone.","Burning anthracite culm banks","Burning coal banks.","National Museum of Natural History (Smithsonian), Washington, D.C, USA","Naturally occuring selenium(IV) oxide, extremely hygroscopic.","For Wayne F. Downey, Jr. (Harrisburg, Pennsylvania, USA), who discovered the mineral. He was a high school student at the time and devised a way to collect the extremely hygroscopic mineral.","2025-08-11 12:14:19",[],[],[],[],[70],{"id":71,"txt":72,"latitude":73,"longitude":74,"country":75},4079,"Forestville Coal Dump Fires, Schuylkill County, Pennsylvania, USA",40.6916667,-76.3,"USA",2,[78,83,86,91],{"id":79,"year":80,"html":81,"doi":82},1195884,1937,"McCullough, James D. (1937) The Crystal Structure of Selenium Dioxide. \u003Ci>Journal Of The American Chemical Society\u003C\u002Fi>,  59 (5) 789-794 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1021\u002Fja01284a004'>doi:10.1021\u002Fja01284a004\u003C\u002Fa>","10.1021\u002Fja01284a004",{"id":84,"year":24,"html":85,"doi":11},526827,"Finkelman, Robert B., Mrose, Mary E. (1977) Downeyite, the first verified natural occurrence of SeO2. \u003Ci>American Mineralogist\u003C\u002Fi>,  62 (3-4) 316-320 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM62\u002FAM62_316.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":87,"year":88,"html":89,"doi":90},113182,1992,"Ståhl, Kenny, Pierre Legros, Jean, Galy, Jean (1992) The crystal structure of SeO2 at 139 and 286 K. \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  202 (1). 99-107 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1992.202.1-2.99'>doi:10.1524\u002Fzkri.1992.202.1-2.99\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fzk\u002Fvol202\u002FZK202_99.pdf' class='refpdflink'>\u003C\u002Fa>","10.1524\u002Fzkri.1992.202.1-2.99",{"id":92,"year":93,"html":94,"doi":11},16964025,2005,"(2005) Downeyite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fdowneyite.pdf' class='refpdflink'>\u003C\u002Fa>",[96],{"id":97,"source_url":98,"license_code":99,"credit_html":100,"title":101,"description":102,"author":103,"original_width":104,"original_height":105},7383,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=98142634","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=98142634\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Downeyite.jpg","One outstanding grey brown single group of whitish microcrystals of the extremely rare selenium dioxide mineral downeyite from one of the only two known localities worldwide , both In Pennsylvania (Burnside, Northumberland County, Pennsylvania, United States of America). Downeyite (SeO2) is a mineral of very simple chemistry but it is extremely rare worldwide, even more in analyzed specimens by SEM\u002FEDS like this one. Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium.","David Hospital",696,586,[107,113],{"id":108,"url":109,"label":110,"formula":111,"spacegroup":112,"year":88},3921,"\u002Fcif\u002F3921.cif","Stahl 1992","Se O2","P 42\u002Fm b c",{"id":114,"url":115,"label":116,"formula":111,"spacegroup":112,"year":80},3923,"\u002Fcif\u002F3923.cif","McCullough 1937",[118,119],"Downeyiet","IMA1974-063",[121,125,130,134,137],{"lang":122,"names":123},"ca",[124],"downeyita",{"lang":126,"names":127},"de",[128,129],"Downeyit","IMA 1974-063",{"lang":131,"names":132},"eu",[133],"Downeyita",{"lang":135,"names":136},"it",[7],{"lang":138,"names":139},"zh",[140],"氧硒石","Q3714796",{"history":11,"applications":11}]