page_title: List of minerals approved by IMA (A)
section_title: Aa – Ak
hierarchical_section_title: List of minerals approved by IMA (A) / A / Aa – Ak
caption_attribution_description: English: Andorite VI, Zinkenite Locality: San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia (Locality at mindat.org) Size: 4.2 x 3.4 x 1.6 cm. From the find in November 2004. Andorite is lead, silver, antimony sulfosalt and was named for the Hungarian mineral collector Andor von Semsey (1833-1923), who holds a remarkable distinction for having two mineral species named after him (andorite and semseyite). This mine at Oruro dates Spanish mining as far back as the year 1595 and was mined by Incan Indians for several centuries prior. In all the years of mining, the specimens found in 2004 are undoubtedly, the world’s finest Andorites extant. These specimens were extracted from the same vein system worked by the father of Bolivian mineralogy, Federico Ahlfeld. Ahlfeld worked the San Jose mine and Itos mine (the other significant andorite locality at the same mountain in Oruro) when the mines were used predominantly as a major sources of tin to the United States during WWII. The best examples of the species have come from Bolivia. The piece features a few "classic", steel-grey, multi-layered crystal groups aesthetically intermixed with rare, prismatic, lustrous Zinkenite "needles" on pyritohedral Pyrite matrix. Deutsch: Andorit VI, Zinkenit Fundort: San José Mine, Oruro City, Cercado, Oruro , Bolivien (Fundort bei mindat.org) Größe: 4.2 x 3.4 x 1.6 cm.
context_page_description: This list includes those recognised minerals beginning with the letter A. 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: Abellaite (IMA2014-111) 5.BE.  [no] [no] 
  (IUPAC: sodium dilead hydro dicarbonate)
  Abelsonite (IMA1975-013) 10.CA.20    
  (IUPAC: a nickel porphyrine derivative)
  Abenakiite-(Ce) (IMA1991-054) 9.CK.10   [no]
  Abernathyite (natroautunite: 1956) 8.EB.15   
  Abhurite (IMA1983-061) 3.DA.30   
  Abramovite (IMA2006-016) 2.HF.25a    
  (IUPAC: dilead tin indium heptasulfa bismuthide)
  Abswurmbachite (braunite: IMA1990-007) 9.AG.05    
  (IUPAC: copper(II) hexamanganese(III) octaoxo tetraoxosilicate)
  Abuite (IMA2014-084) 8.B0.  [no] [no] 
  (IUPAC: calcium dialuminium difluoro diphosphate)
  Acanthite (acanthite: 1855) 2.BA.35    
  (IUPAC: disilver sulfide)
  Acetamide (IMA1974-039) 10.AA.20    
  (IUPAC: acetic acid amide)
  Achalaite (wodginite: IMA2013-103) 4.D0.  [no] [no] 
  (IUPAC: iron(II) titanium diniobium octaoxide)
  Achávalite (nickeline: 1939) 2.CC.05   [no] 
  (IUPAC: iron selenide)
  Achyrophanite (IMA2018-011) 8.0  [no] [no]
  Acmonidesite (IMA2013-068) 7.AC.  [no] [no]
  Actinoliteᴵ [Ca-amphibole: IMA2012 s.p., actynolite (1794)] 9.DE.10   
  Acuminite (tikhonenkovite: IMA1986-038) 3.CC.10    
  (IUPAC: strontium hydro tetrafluoroaluminate monohydrate)
  Adachiite (tourmaline: IMA2012-101) 9.CK.  [no] 
  Adamite (andalusite: 1866) 8.BB.30    
  (IUPAC: dizinc hydro arsenate)
  Adamsite-(Y) (IMA1999-020) 5.CC.30    
  (IUPAC: sodium yttrium dicarbonate hexahydrate)
  Adanite (IMA2019-088) 7.0  [no] [no] 
  (IUPAC: dilead tellurite sulfate)
  Addibischoffite (sapphirine: IMA2015-006) 4.BC.  [no] [no]
  Adelite (Y: 1891) 8.BH.35    
  (IUPAC: calcium magnesium hydro arsenate)
  Admontite (IMA1978-012) 6.FA.15    
  (IUPAC: magnesio decaoxo hexaborate heptahydrate)
  Adolfpateraite (IMA2011-042) 7.EC.  [no]  
  (IUPAC: potassium uranyl hydro sulfate water)
  Adranosite 7.BC.
  Adranosite (IMA2008-057) 7.BC.   
  Adranosite-(Fe) (IMA2011-006) 7.BC.  [no] 
  Adrianite (IMA2014-028) 9.AD.  [no] [no]
  Aegirine (pyroxene: IMA1998 s.p., 1835) 9.DA.25    
  (IUPAC: sodium iron(III) hexaoxy disilicate)
  Aegirine-augiteᴵ (pyroxene: IMA1988 s.p., 1988 Rd) 9.DA.20  [no] [no]
  Aenigmatite (sapphirine: IMA1967 s.p., 1865) 9.DH.40   
  Aerinite (IMA1988 s.p., 1876 Rd) 9.DB.45   
  Aerugite (IMA1965 s.p., 1858 Rd) 8.BC.15   
  Aeschynite 04.DF.05
  Aeschynite-(Ce) (IMA1987 s.p., 1830) 4.DF.05   
  Aeschynite-(Nd) (IMA1987 s.p., 1982) 4.DF.05   
  Aeschynite-(Y) (IMA1987 s.p., 1906) 4.DF.05   
  Afghanite (cancrinite-sodalite: IMA1967-041) 9.FB.05   
  Afmite (IMA2005-025a) 8.DD.15  [no] 
  Afwillite (spurrite-afwillite: 1925) 9.AG.75    
  (IUPAC: tricalcium tetraoxysilicate dihydroxosilicate dihydrate)
  Agaite (tellurium oxysalt: IMA2011-115) 7.D?.  [no] [no] 
  (IUPAC: trilead copper(II) tellurium(VI) dihydro pentaoxide carbonate)
  Agakhanovite-(Y) (milarite: IMA2013-090) 9.CM.  [no] [no]
  Agardite 08.DL.15 
  (IUPAC: REE hexacopper(II) hexahydro triarsenate trihydrate)
  Agardite-(Ce) (mixite: IMA2003-030) 8.DL.15   [no]
  Agardite-(La) (mixite: IMA1980-092) 8.DL.15   
  Agardite-(Nd) (mixite: IMA2010-056) 8.DL.15   
  Agardite-(Y) (mixite: IMA1968-021) 8.DL.15   
  Agmantinite (wurtzite: IMA2014-083) 2.CB.  [no] [no] 
  (IUPAC: disilver manganese tetrasulfa stannide)
  Agrellite (IMA1973-032) 9.DH.75    
  (IUPAC: sodium dicalcium fluoro decaoxo tetrasilicate)
  Agricolaite (IMA2009-081) 5.ED.50  [no] [no] 
  (IUPAC: tetrapotassium uranyl tricarbonate)
  Agrinierite (compreignacite: IMA1971-046) 4.GB.05   
  Aguilarite (acanthite: 1891) 2.BA.55    
  (IUPAC: tetrasilver selenide sulfide)
  Monoclinic ‘acanthite-like’ series (from Ag₂S-Ag₂S0.4Se0.6)
  Orthorhombic ‘naumannite-like’ series (from Ag₂S0.3Se0.7-Ag₂Se)
  Aheylite (turquoise: IMA1984-036) 8.DD.15   
  Ahlfeldite (cobaltomenite: 1935) 4.JH.10    
  (IUPAC: nickel selenite(IV) dihydrate)
  Ahrensite (spinel, ringwoodite: IMA2013-028) 9.AC.  [no] [no] 
  (SiFe₂O₄)
  Aikinite (meneghinite: 1843) 2.HB.05a    
  (IUPAC: copper lead trisulfa bismuthide)
  Aiolosite (apatite: IMA2008-015) 7.BD.20   [no]
  Ajoite (ajoite: 1958) 9.EA.70   
  Akaganéite (hollandite, coronadite: IMA1962-004) 4.DK.05   
  Akaogiite (baddeleyite: IMA2007-058) 4.D0.  [no] [no] 
  (IUPAC: titanium dioxide)
  Akatoreite (IMA1969-015) 9.BH.15   
  Akdalaite (no
caption: Andorite from San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
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