List of minerals recognized by the International Mineralogical Association (O)
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 (these are called "grandfathered" species).
The list is divided into groups:
- Introduction • (Main synonyms)
- 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 'IMA2021'.
The minerals are sorted by name, followed by the structural group (rruff.info/ima and ima-cnmnc by mineralienatlas.de, mainly) or chemical class (mindat.org and basics), the year of publication (if it's before of an IMA approval procedure), the IMA approval and the Strunz-mindat code. The first link is to mindat.org, the second link is to webmineral.com, and the third is to the Handbook of Mineralogy (Mineralogical Society of America).
- Abbreviations:
- D – discredited (IMA/CNMNC status).
- Q – questionable/ doubtful (IMA/CNMNC, mindat.org or mineralienatlas.de status).
- N – published without approval of the IMA/CNMNC, or just not an IMA approved mineral but with some acceptance in the scientific community nowadays.
- I – intermediate member of a solid-solution series.
- H – hypothetical mineral (synthetic, anthropogenic, suspended approval procedure, etc.)
- ch – incomplete description, hypothetical solid solution end member.
- Rd – redefinition of ...
- "s.p." – special procedure.
- group – a name used to designate a group of species, sometimes only a mineral group name.
- no – no link available.
- IUPAC – chemical name.
- Y: NNNN – year of publication.
- Y: old – known before publications were available.
O
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Okenit%2C_Gyrolith%2C_Prehnit._Indien...2H1A6998OB.jpg/220px-Okenit%2C_Gyrolith%2C_Prehnit._Indien...2H1A6998OB.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Olivenite-Malachite-165802.jpg/170px-Olivenite-Malachite-165802.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/50/Olmiite-122298.jpg/220px-Olmiite-122298.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Opal-53714.jpg/220px-Opal-53714.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Boulder_Opal.jpg/220px-Boulder_Opal.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Beryl-Opal-k-168a.jpg/220px-Beryl-Opal-k-168a.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Orpiment-131476.jpg/220px-Orpiment-131476.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Orthoclase-es15a.jpg/220px-Orthoclase-es15a.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Ottensite-Stibnite-160201.jpg/220px-Ottensite-Stibnite-160201.jpg)
- Oberthürite (IMA2017-072) [1] [no] [no]
- Oboyerite (tellurite-tellurium oxysalt: IMA1979-009) 04.JN.25 [2] [3] [4]
(IUPAC: hexahydrogen hexalead tritellurate(IV) dihexaoxotellurate(VI) dihydrate) - Obradovicite 07.GB.40 heteropolymolybdate, betpakdalite
- O'danielite (alluaudite: IMA1979-040) 08.AC.10 [10] [11] [12]
- Odigitriaite (IMA2015-028) 09.E [13] [no] [no]
(IUPAC: caesium pentasodium pentacalcium [diboro octatriacontaoxotetradecasilicate] difluorine) - Odinite (serpentine: IMA1988-015) 09.ED.05 [14] [15] [16]
- Odintsovite (IMA1994-052) 09.CJ.50 [17] [18] [no]
- Oenite (löllingite: IMA1995-007) 02.EB.10f [19] [20] [21]
- Offretite (zeolitic tectosilicate: IMA1997 s.p., 1969) 09.GD.25 [22] [23] [24]
(IUPAC: potassium calcium magnesium (pentaalumotridecasilicate) hexatriacontaoxide pentadecahydrate) - Oftedalite (milarite: IMA2003-045a) 09.CM.05 [25] [26] [27]
- Ogdensburgite (IMA1980-054) 08.DC.57 [28] [29] [30]
(IUPAC: dicalcium tetrairon(III) zinc tetraarsenate hexahydroxy hexahydrate) - Ohmilite (IMA1974-031) 09.DH.10 [31] [32] [33]
- Ojuelaite (arthurite: IMA1979-035) 08.DC.15 [34] [35] [36]
(IUPAC: zinc diiron(III) diarsenate dihydroxy tetrahydrate) - Okanoganite-(Y) (okanoganite: IMA1979-048) 09.AJ.35 [37] [38] [39]
- Okayamalite (melilite: IMA1997-002) 09.BB.10 [40] [41] [no]
(IUPAC: dicalcium diboro heptaoxosilicate) - Okenite (Y: 1828) 09.EA.40 [42] [43] [44]
(IUPAC: decacalcium hexatetracontaoxoctadecasilicate octadecahydrate) - Okhotskite (IMA1985-010a) 09.BG.20 [45] [46] [47]
- Okruschite (roscherite: IMA2013-097) 08. [48] [no] [no]
(IUPAC: dicalcium pentamanganese(II) tetraberyllium hexaarsenate tetrahydroxy hexahydrate) - Oldhamite (galena, rocksalt: 1863) 02.CD.10 [49] [50] [51]
(IUPAC: calcium sulfide) - Olekminskite (IMA1989-047) 05.AB.40 [52] [53] [54]
(IUPAC: distrontium dicarbonate) - Olenite (tourmaline: IMA1985-006) 09.CK.05 [55] [56] [57]
- Olgite (aphthitalite: IMA1979-027) 08.AC.40 [58] [59] [60]
- Olivenite (andalusite: 1820), 08.BB.30 [61] [62] [63]
(IUPAC: dicopper arsenate hydroxy) - Olkhonskite (schreyerite: IMA1993-035) 04.CB.35 [64] [65] [66]
(IUPAC: dichromium trititanium nonaoxide) - Olmiite (IMA2006-026) 09.AF.90 [67] [68] [no]
(IUPAC: calcium manganese [hydrotrioxosilicate] hydroxy) - Olmsteadite (IMA1974-034) 08.DJ.05 [69] [70] [71]
(IUPAC: potassium diiron(II) niobium dioxo diphosphate dihydrate) - Olsacherite (baryte: IMA1969-009) 07.AD.35 [72] [73] [74]
(IUPAC: dilead (tetraoxoselenate(VI)) sulfate) - Olshanskyite (IMA1968-025) 06.CA.55 [75] [76] [77]
- Olympite (IMA1979-065) 08.AA.30 [78] [79] [80]
(IUPAC: lithium pentasodium diphosphate) - Omariniite (IMA2016-050) 02.?? [81] [no] [no]
(Cu8Fe2ZnGe2S12) - Omeiite (löllingite: IMA1985-xxx, 1978) 02.EB.15a [82] [83] [84]
(IUPAC: osmium diarsenide) - Ominelite (IMA1999-025) 09.AJ.05 [85] [86] [no]
(IUPAC: iron(II) trialuminium dioxo trioxoborate tetraoxosilicate) - Omongwaite (IMA2003-054b) 07.CD.65 [87] [88] [89]
(IUPAC: disodium pentacalcium hexasulfate trihydrate) - Omphacite (pyroxene: IMA1988 s.p.) 09.DA.20 [90] [91] [92]
- Omsite (hydrotalcite: IMA2012-025) 04.FB. [93] [no] [94]
(IUPAC: dinickel iron(III) hexahydroxy [antimony hexahydroxy]) - Ondrušite (lindackerite: IMA2008-010) 08.CE.30 [95] [no] [no]
(IUPAC: calcium tetracopper diarsenate di(hydroxoarsenate(V)) decahydrate) - Oneillite (eudialyte: IMA1998-064) 09.CO.10 [96] [97] [no]
- Onoratoite (IMA1967-032) 03.DC.80 [98] [99] [100]
(IUPAC: octaantimony undecaoxide dichloride) - Oosterboschite (IMA1970-016) 02.BC.10 [101] [102] [103]
(IUPAC: hepta(lead,copper) pentaselenide) - Opal (Y: old) 04.DA.10 [104] [105] [no]
- Ophirite (heteropolytungstate: IMA2013-017) 04. [106] [no] [no]
- Oppenheimerite (IMA2014-073) 07. [107] [no] [no]
(IUPAC: disodium uranyl disulfate trihydrate) - Orcelite (metalloid alloy: IMA1962 s.p., 1959) 02.AB.10 [108] [109] [110]
(Ni(5-x)As2 (x = 0.23)) - Ordoñezite (tapiolite: 1955) 04.DB.10 [111] [112] [113]
(IUPAC: zinc diantimony(V) hexaoxide) - Örebroite (welinite: IMA1985-039) 09.AF.75 [114] [115] [116] [117]
- Oregonite (IMA1962 s.p., 1959) 02.BB.05 [118] [119] [120]
(IUPAC: iron dinickel diarsenide) - Organovaite 09.CE.30g
- Orickite (IMA1978-059) 02.FB.15 [125] [126] [127]
(IUPAC: copper iron disulfide monohydrate) - Orientite (Y: 1921) 09.BJ.05 [128] [129] [130]
- Orlandiite (selenite: IMA1998-038, IMA1998-035) 04.JH.20 [131] [132] [133]
(IUPAC: trilead tetrachlorine trioxoselenate(IV) monohydrate) - Orlovite (mica: IMA2009-006) 09.EC.20 [134] [no] [no]
(IUPAC: potassium dilithium titanium undecaoxytetrasilicate fluorine) - Orlymanite (IMA1988-029) 09.EE.30 [135] [136] [137]
- Orpiment (orpiment: 1944) 02.FA.30 [138] [139] [140]
(IUPAC: trisulfa diarsenide) - Orschallite (sulfite: IMA1990-041) 04.JE.15 [141] [142] [143]
(IUPAC: tricalcium disulfite sulfate dodecahydrate) - Orthobrannerite (IMA1982 s.p., 1978) 04.DH.05 [144] [145] [146]
(IUPAC: uranium(IV) uranium(VI) tetratitanium dodecaoxide dihydroxy) - Orthoclase (feldspar: IMA1962 s.p., 1823) 09.FA.30 [147] [148] [149]
(IUPAC: potassium (alumino octaoxotrisilicate) - Orthojoaquinite 09.CE.25
- Orthominasragrite (minasragrite: IMA2000-018) 07.DB.20 [156] [157] [158]
(IUPAC: vanadium(IV) oxosulfate pentahydrate) - Orthopinakiolite (orthopinakiolite: IMA1962 s.p., 1960) 06.AB.40 [159] [160] [161]
(IUPAC: dimagnesium manganese(III) dioxo(trioxoborate)) - Orthoserpierite (IMA1983-022a) 07.DD.30 [162] [163] [164]
(IUPAC: calcium tetracopper disulfate hexahydroxy trihydrate) - Orthowalpurgite (IMA1994-024) 08.EA.05 [165] [166] [167]
(IUPAC: uranyl tetrabismuth tetraoxo diarsenate dihydrate) - Osakaite (ktenasite: IMA2006-049) 07.DE.40 [168] [169] [170]
(IUPAC: tetrazinc sulfate hexahydroxy pentahydrate) - Osarizawaite (alunite: IMA1987 s.p., 1961 Rd) 07.BC.10 [171] [172] [173]
(IUPAC: lead (dialuminium copper(II)) disulfate hexahydroxy) - Osarsite (arsenopyrite: IMA1971-025) 02.EB.20 [174] [175] [176]
(IUPAC: osmium sulfaarsenide) - Osbornite (nitride: 1870) 01.BC.15 [177] [178] [179]
(IUPAC: titanium nitride) - Oscarkempffite (lillianite: IMA2011-029) 02. [180] [no] [no]
(Ag10Pb4(Sb17Bi9)S48) - Oskarssonite (perovskite: IMA2012-088) 03. [181] [no] [182]
(IUPAC: aluminium trifluoride) - Osmium (element: IMA1991 s.p., 1804 Rd) 01.AF.05 [183] [184] [185]
- Osumilite 09.CM.05
- Oswaldpeetersite (IMA2000-034) 05.EA.20 [192] [193] [194]
(IUPAC: diuranyl carbonate dihydroxy tetrahydrate) - Otavite (calcite: 1842) 05.AB.05 [195] [196] [197]
(IUPAC: cadmium carbonate) - Otjisumeite (IMA1978-080) 09.J0.15 [198] [199] [200]
(IUPAC: lead tetragermanium nonaoxide) - Ottemannite (IMA1968 s.p., 1966) 02.DB.10 [201] [202] [203]
(IUPAC: ditin trisulfide) - Ottensite (IMA2006-014) 02.MA.05 [204] [205] [no]
(IUPAC: trisodium tri(trioxodiantimony) (trisulfa antimonide) trihydrate) - Ottohahnite (IMA2015-098) 07. [206] [no] [no]
(IUPAC: dodecasodium tetrauranyl decasulfate tetradecawater trihydrate) - Ottoite (lead-tellurium oxysalt: IMA2009-063) 07. [207] [no] [no]
(IUPAC: dilead tellurium pentaoxide) - Ottrélite (Y: 1842) 09.AF.85 [208] [209] [210]
(IUPAC: manganese(II) dialuminium oxotetraoxosilicate dihydroxy) - Otwayite (IMA1976-028) 05.DA.15 [211] [212] [213]
(IUPAC: dinickel carbonate dihydroxy monohydrate) - Oulankaite (IMA1990-055) 02.BC.40 [214] [215] [216]
(IUPAC: pentalead tetracopper tin disulfa ditelluride) - Ourayite (lillianite: IMA1976-007) 02.JB.40c [217] [218] [219]
(Ag3Pb4Bi5S13) - Oursinite (IMA1982-051) 09.AK.10 [220] [221] [222]
(IUPAC: cobalt diuranyl di( hydrotrioxosilicate) hexahydrate) - Ovamboite (germanite: IMA1992-039) 02.CB.30 [223] [224] [no]
(Cu10Fe3WGe3S16) - Overite (overite: 1940) 08.DH.20 [225] [226] [227]
(IUPAC: calcium magnesium aluminium diphosphate hydroxy tetrahydrate) - Owensite (IMA1993-061) 02.FC.05 [228] [229] [230]
((Ba,Pb)6(Cu1+,Fe,Ni)25S27) - Owyheeite (Y: 1920) 02.HC.35 [231] [232] [233]
(Ag3Pb10Sb11S28) - Oxammite (oxalate: 1870) 10.AB.55 [234] [235] [236]
(IUPAC: diammonium oxalate monohydrate) - Oxo-magnesio-hastingsite [amphibole: IMA2011-035] 09.D [237] [no] [no]
- Oxo-mangani-leakeite [amphibole: IMA2015-035] 09.D [238] [no] [no]
- Oxycalciopyrochlore (pyrochlore: IMA2010 s.p., IMA1978-052 Rd) 04. [239] [240] [241]
(IUPAC: dicalcium diniobium hexaoxo oxide) - Oxycalcioroméite (pyrochlore: IMA2012-022) 04. [242] [no] [no]
(IUPAC: dicalcium diantimony(V) heptaoxide) - Oxy-chromium-dravite (tourmaline: IMA2011-097) 09.CK.?? [243] [no] [no]
- Oxy-dravite (tourmaline: IMA2012-004a) 09.CK.05 [244] [no] [no]
- Oxy-foitite (tourmaline: IMA2016-069) 09.CK.05 [245] [no] [no]
- Oxykinoshitalite (mica: IMA2004-013) 09.EC.35 [246] [247] [248]
- Oxynatromicrolite (pyrochlore: IMA2013-063) 04. [249] [no] [no]
- Oxyphlogopite (mica: IMA2009-069) 09.EC.20 [250] [no] [no]
- Oxyplumboroméite (pyrochlore: IMA2013-042) 04. [251] [no] [no]
(IUPAC: dilead diantimony heptaoxide) - Oxy-schorl (tourmaline: IMA2011-011) 09.CK.?? [252] [no] [no]
- Oxystannomicrolite (pyrochlore: IMA2010 s.p., 1968 Rd) 04. [253] (red. [254]) [255] [256]
(IUPAC: ditin ditantalum heptaoxide) - Oxystibiomicrolite (pyrochlore: IMA2010 s.p., 1938 Rd) 04. [257] (red. [258]) [259] [260]
- Oxy-vanadium-dravite (tourmaline: IMA2011-E, IMA1999-050 Rd) 09.CK.05 [261] [262] [no]
- Oxyvanite (IMA2008-044) 04.CB.30 [263] [264] [no]
(IUPAC: divanadium(III) vanadium(IV) pentaoxide) - Oyelite (IMA1980-103) 09.HA.80 [265] [266] [267]
(IUPAC: decacalcium diboro nonadocosaoxoctasilicate dodecahydrate) - Oyonite (IMA2018-002)
- Ozerovaite (IMA2016-019) 08. [268] [no] [no]
(IUPAC: disodium potassium trialuminium tetraarsenate)