page_title: List of minerals approved by IMA (O)
section_title: O
hierarchical_section_title: List of minerals approved by IMA (O) / O
caption_attribution_description: English: Orthoclase Locality: Zinnenthal, Switzerland Size: small cabinet, 5.4 x 3.9 x 3.2 cm Adularia (twinned) This orthoclase var. adularia crystal is large and fine for the species. The almost white color, high luster, and translucence really stand out making this piece a winner. It is twinned down the middle (more visible in person), and also has better lustre in person. Deutsch: Orthoklas Größe: 5.4 x 3.9 x 3.2 cm
context_page_description: This list includes those recognised minerals beginning with the letter O. The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species.
  The list is divided into groups:
  Introduction •
  A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P–Q • R • S • T • U–V • W–X • Y–Z
  The data was exported from mindat.org on 29 April 2005; updated up to 'IMA2019'.
  The minerals are sorted by name, followed by the structural group or chemical class, the year of publication, the IMA approval and the Nickel–Strunz code. The first link is to mindat.org, the second link is to webmineral.com, and the third is to the Handbook of Mineralogy.
  Abbreviations:
  ᴰ – discredited.
  Q – questionable/ doubtful.
context_section_description: Oberthürite (IMA2017-072) 2.0  [no] [no]
  Oboyerite (tellurite-tellurium oxysalt: IMA1979-009) 4.JN.25    
  (IUPAC: hexahydrogen hexalead tritellurate(IV) dihexaoxotellurate(VI) dihydrate)
  Obradovicite (heteropolymolybdate, betpakdalite) 7.GB.40
  Obradovicite-KCu (IMA2010-E, IMA1978-061) 7.GB.40   
  Obradovicite-NaCu (IMA2011-079) 7.GB.40  [no] [no]
  Obradovicite-NaNa (IMA2011-046)  7.GB.40  [no] [no]
  O'danielite (alluaudite: IMA1979-040) 8.AC.10    
  (Na☐ZnZn₂[AsO₄][AsO₃(OH)]₂)
  Odigitriaite (IMA2015-028) 9.E?.  [no] [no] 
  (IUPAC: caesium pentasodium pentacalcium [diboron octatriacontaoxotetradecasilicate] difluoride)
  Odinite (serpentine: IMA1988-015) 9.ED.05   
  Odintsovite (IMA1994-052) 9.CJ.50   [no]
  Oenite (löllingite: IMA1995-007) 2.EB.10f   
  Offretite (zeolitic tectosilicate: IMA1997 s.p., 1969) 9.GD.25    
  (IUPAC: potassium calcium magnesium (pentaalumotridecasilicate) hexatriacontaoxy pentadecahydrate)
  Oftedalite (milarite: IMA2003-045a) 9.CM.05   
  Ogdensburgite (IMA1980-054) 8.DC.57    
  (IUPAC: dicalcium tetrairon(III) zinc hexahydro tetrarsenate hexahydrate)
  Ognitite (IMA2018-006a) 2.0 [no] [no] [no] 
  (IUPAC: nickel bismuth telluride)
  Ohmilite (IMA1974-031) 9.DH.10   
  Ojuelaite (arthurite: IMA1979-035) 8.DC.15    
  (IUPAC: zinc diiron(III) dihydro diarsenate tetrahydrate)
  Okanoganite-(Y) (okanoganite: IMA1979-048) 9.AJ.35   
  Okayamalite (melilite: IMA1997-002) 9.BB.10   [no] 
  (IUPAC: dicalcium diboron heptaoxosilicate)
  Okenite (Y: 1828) 9.EA.40    
  (IUPAC: decacalcium hexatetracontaoxoctadecasilicate octadecahydrate)
  Okhotskite (IMA1985-010a) 9.BG.20   
  Okieite (decavanadate: IMA2018-080) 4.0  [no] [no]
  Okruschite (roscherite: IMA2013-097) 8.0  [no] [no] 
  (IUPAC: dicalcium pentamanganese(II) tetraberyllium tetrahydro hexarsenate hexahydrate)
  Oldhamite (galena, rocksalt: 1863) 2.CD.10    
  (IUPAC: calcium sulfide)
  Olekminskite (IMA1989-047) 5.AB.40    
  (IUPAC: distrontium dicarbonate)
  Olenite (tourmaline: IMA1985-006) 9.CK.05   
  Olgite (aphthitalite: IMA1979-027) 8.AC.40   
  Olivenite (andalusite: 1820) 8.BB.30    
  (IUPAC: dicopper hydro arsenate)
  Olkhonskite (schreyerite: IMA1993-035) 4.CB.35    
  (IUPAC: dichromium trititanium nonaoxide)
  Olmiite (IMA2006-026) 9.AF.90   [no] 
  (IUPAC: calcium manganese [hydrotrioxosilicate] hydroxyl)
  Olmsteadite (IMA1974-034) 8.DJ.05    
  (IUPAC: potassium diiron(II) niobium dioxo diphosphate dihydrate)
  Olsacherite (baryte: IMA1969-009) 7.AD.35    
  (IUPAC: dilead (tetraoxoselenate(VI)) sulfate)
  Olshanskyite (IMA1968-025) 6.CA.55   
  Olympite (IMA1979-065) 8.AA.30    
  (IUPAC: lithium pentasodium diphosphate)
  Omariniite (IMA2016-050) 2.0  [no] [no] 
  (Cu₈Fe₂ZnGe₂S₁₂)
  Omeiite (löllingite: IMA1985-xxx, 1978) 2.EB.15a    
  (IUPAC: osmium diarsenide)
  Ominelite (IMA1999-025) 9.AJ.05   [no] 
  (IUPAC: iron(II) trialuminium dioxy trioxoborate tetraoxysilicate)
  Omongwaite (IMA2003-054b) 7.CD.65    
  (IUPAC: disodium pentacalcium hexasulfate trihydrate)
  Omphacite (pyroxene: IMA1988 s.p.) 9.DA.20   
  Omsite (hydrotalcite: IMA2012-025) 4.FB.  [no]  
  (IUPAC: dinickel iron(III) hexahydroxide [antimony hexahydroxide])
  Ondrušite (lindackerite: IMA2008-010) 8.CE.30  [no] [no] 
  (IUPAC: calcium tetracopper diarsenate di(hydroxoarsenate(V)) decahydrate)
  Oneillite (eudialyte: IMA1998-064) 9.CO.10   [no]
  Onoratoite (IMA1967-032) 3.DC.80    
  (IUPAC: octaantimony undecaoxide dichloride)
  Oosterboschite (IMA1970-016) 2.BC.10    
  (IUPAC: hepta(lead,copper) pentaselenide)
  Opal (a mineraloid) (Y: old) 4.DA.10   [no]
  Ophirite (heteropolytungstate: IMA2013-017) 4.0  [no] [no]
  Oppenheimerite (IMA2014-073) 7.0  [no] [no] 
  (IUPAC: disodium uranyl disulfate trihydrate)
  Orcelite (metalloid alloy: IMA1962 s.p., 1959) 2.AB.10    
  (Ni₍₅₋ₓ₎As₂ (x = 0.23))
  Ordoñezite (tapiolite: 1955) 4.DB.10    
  (IUPAC: zinc diantimony(V) hexaoxide)
  Örebroite (welinite: IMA1985-039) 9.AF.75    
  Oregonite (IMA1962 s.p., 1959) 2.BB.05    
  (IUPAC: iron dinickel diarsenide)
  Organovaite (labuntsovite) 9.CE.30g
  Organovaite-Mn (IMA2000-031) 9.CE.30g   [no]
  Organovaite-Zn (IMA2001-006) 9.CE.30g   [no]
  Orickite (IMA1978-059) 2.FB.15    
  (IUPAC: copper iron disulf
caption: Orthoclase. Zinnenthal, Switzerland
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