List of minerals A (complete)

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 (these are called "grandfathered" species).

The list is divided into groups:

The data was exported from mindat.org on 29 April 2005; updated up to 'IMA2016'.

The minerals are sorted by name with the year of publication (if it's before of an IMA approval procedure), followed by 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 (Mineralogical Society of America).

A

Aa – Ak

Acanthite, Chispas Mine, Arizpe, Sonora, Mexico
Actinolite (acicular form) with calcite
Combination of jet-black aegirines splaying out from matrix of feldspar
Afghanite on the left, lazurite on the right.
Afghanite viewed under ultra-violet light: calcite emits rose light as afghanite, lazurite doesn't emit visible light.
Ajoite in quartz - Messina mine, Limpopo Province, South Africa
Åkermanite (yellowish brown), calcite (blue), hillebrandite (variety foshagite, fibrous), tilleyite (mallow colored), from Crestmore, Riverside, California, USA
Almandine garnet crystal
Allophane
Amazonite from Brazil
Amethyst crystals
Andorite from San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
Pastel-pink apatite crystal, transparent quartz crystals, jet-black schorl, muscovite and sharp albite crystals
Crystals of apophyllite piled up on matrix
Mint green apophyllite-(KF) rosette, Momin Pada, Maharashtra, India
Apophyllite-(NaF). Nasik District, Maharashtra, India
Nagar aquamarines have a tendency to form large clusters; from Nagar (Nagir), Hunza Valley, Gilgit District, Northern Areas, Pakistan
Arfvedsonite, Poudrette quarry, Mont Saint-Hilaire, Montérégie, Quebec
Arsendescloizite and mimetite, Ojuela Mine, Mapimí, Durango, Mexico
Native arsenic crystals, Ronna Mine, Kladno, Bohemia, Czech Republic
Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico
Crystal of augelite stands out in this cluster
Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals
Aurichalcite crystals in calcite
Austinite, from Durango, Mexico
Autunite, 6.5 × 5.5 × 4 cm, Daybreak Mine, Spokane County, Washington, US
Axinite-(Mn), with sharp curving crystals to 4 cm. West Bor Pit at Dalnegorsk, Russia
Axinite-(Mn), Vitória da Conquista, Bahia, Brazil size 5.5 × 2.4 × 0.8 cm
Exceptionally large azurite crystal, 6 × 2 × 2 cm, Tsumeb, Namibia
Deep blue, sparkly crystals of azurite in a shallow vug, on a matrix of azurite
  1. Abellaite (IMA2014-111) 05.??
  2. Abelsonite (IMA1975-013) 10.CA.20
    (IUPAC: a nickel porphyrine derivative)
  3. Abenakiite-(Ce) (IMA1991-054) 09.CK.10 [no]
  4. Abernathyite (Y: 1956) 08.EB.15
  5. AbhuriteH (IMA1983-061) 03.DA.30
  6. Abramovite (IMA2006-016) 02.HF.25a
    (IUPAC: Dilead tin indium bismuth heptasulfide)
  7. Abswurmbachite (IMA1990-007) 09.AG.05
  8. Abuite (IMA2014-084) 08.B0.?? [no] [no]
    (IUPAC: Calcium dialuminium diphosphate difluoride)
  9. Acanthite (Y: 1855) 02.BA.35
    (IUPAC: Disilver sulfide)
  10. Acetamide (IMA1974-039) 10.AA.20
    (IUPAC: Acetic acid amide)
  11. Achalaite (IMA2013-103) 04.?? [no] [no]
  12. Achávalite (Y: 1939) 02.CC.05 [no]
  13. Acmonidesite (IMA2013-068) 07.?? [no] [no]
  14. Actinolite [amphibole: IMA2012 s.p., actynolite (1794) Rd] 09.DE.10
  15. Acuminite (IMA1986-038) 03.CC.10
    (IUPAC: Strontium aluminium tetrafluoride hydroxyl monohydrate)
  16. Adachiite (IMA2012-101) 09.CK.?? [no]
  17. Adamite (Y: 1866) 08.BB.30
    (IUPAC: Dizinc arsenate hydroxyl)
  18. Adamsite-(Y) (IMA1999-020) 05.CC.30
    (IUPAC: Sodium yttrium dicarbonate hexahydrate)
  19. Addibischoffite (IMA2015-006) 04.??. [no] [no]
  20. Adelite (Y: 1892) 08.BH.35
    (IUPAC: Calcium magnesium arsenate hydroxyl)
  21. Admontite (IMA1978-012) 06.FA.15
  22. Adolfpateraite (IMA2011-042) 07.?? [no]
  23. Adranosite 07.??
    1. Adranosite (IMA2008-057) 07.??
    2. Adranosite-(Fe) (IMA2011-006) 07.?? [no]
  24. Adrianite (IMA2014-028) 09.?? [no] [no]
  25. Aegirine (IMA1998 s.p., 1835) 09.DA.25
  26. Aegirine-augiteI (IMA1988 s.p., 1988 Rd) 09.DA.20 [no] [no]
  27. Aenigmatite (IMA1967 s.p., 1865) 09.DH.40
  28. Aerinite (IMA1988 s.p., 1876 Rd) 09.DB.45
  29. Aerugite (IMA1965 s.p., 1858 Rd) 08.BC.15
  30. Aeschynite 04.DF.05
    1. Aeschynite-(Ce) (IMA1987 s.p., 1830) 04.DF.05
    2. Aeschynite-(Nd) (IMA1987 s.p., 1982) 04.DF.05
    3. Aeschynite-(Y) (IMA1987 s.p., 1906) 04.DF.05
  31. Afghanite (IMA1967-041) 09.FB.05
  32. Afmite (IMA2005-025a) 08.DD.15 [no]
  33. Afwillite (Y: 1925) 09.AG.75
  34. Agaite (IMA2011-115) 07.?? [no] [no]
  35. Agakhanovite-(Y) (IMA2013-090) 09.?? [no] [no]
    Chemical formula: YCaKBe3Si12O30·H2O
  36. Agardite 08.DL.15
    1. Agardite-(Ce) (IMA2003-030) 08.DL.15 [no]
    2. Agardite-(La) (IMA1980-092) 08.DL.15
    3. Agardite-(Nd) (IMA2010-056) 08.DL.15 [no]
    4. Agardite-(Y) (IMA1968-021) 08.DL.15
  37. Agmantinite (IMA2014-083) 02.??. [no] [no]
    (IUPAC: Disilver manganese tin tetrasulfide)
  38. Agrellite (IMA1973-032) 09.DH.75
  39. Agricolaite (IMA2009-081) 05.ED.50 [no] [no]
  40. Agrinierite (IMA1971-046) 04.GB.05
  41. Aguilarite (Y: 1891) 02.BA.55
    (IUPAC: Tetrasilver selenide sulfide)
  42. Aheylite (IMA1984-036) 08.DD.15
  43. Ahlfeldite (Y: 1935) 04.JH.10
    (IUPAC: Nickel selenite (IV) dihydrate)
  44. Ahrensite (IMA2013-028) 09.AC.?? [no] [no]
    (IUPAC: Diiron nesosilicate, SiO4)
  45. Aikinite (Y: 1843) 02.HB.05a
    (IUPAC: Copper lead bismuth trisulfide)
  46. Aiolosite (IMA2008-015) 07.BD.20 [no]
  47. Ajoite (Y: 1958) 09.EA.70
  48. Akaganéite (IMA1962-004) 04.DK.05
  49. Akaogiite (IMA2007-058) 04.?? [no] [no]
    (IUPAC: Titanium dioxide)
  50. Akatoreite (IMA1969-015) 09.BH.15
  51. Akdalaite (IMA1969-002) 04.FL.70
  52. Åkermanite (Y: 1884) 09.BB.10
  53. Akhtenskite (IMA1982-072) 04.DB.15b
    (IUPAC: Manganese dioxide)
  54. Akimotoite (IMA1997-044) 04.CB.05 [no]
  55. Aklimaite (IMA2011-050) 09.?? [no]
  56. Akrochordite (Y: 1922) 08.DD.10
  57. Aksaite (IMA1967 s.p., 1962) 06.FA.05
  58. Aktashite (IMA2008 s.p., 1962) 02.GA.30

Al – An

  1. Alabandite (Y: 1822) 02.CD.10
    (IUPAC: Manganese(II) sulfide)
  2. Alacránite (IMA1985-033) 02.FA.20
    (IUPAC: Octaarsenic nonasulfide)
  3. Alamosite (Y: 1909) 09.DO.20
  4. Alarsite (IMA1993-003) 08.AA.05
    (IUPAC: Aluminium arsenate)
  5. Albertiniite (IMA2015-004) 04.??. [no] [no]
  6. Albite (Y: 1815) 09.FA.35
  7. Albrechtschraufite (IMA1983-078) 05.ED.15
  8. Alburnite (IMA2012-073) 02.?? [no] [no]
    (IUPAC: Octasilver germanium ditelluride tetrasulfide)
  9. Alcaparrosaite (IMA2011-024) 07.?? [no]
  10. Aldermanite (IMA1980-044) 08.DE.35
  11. Aldridgeite (IMA2010-029) 07.?? [no] [no]
  12. Aleksandrovite (IMA2009-004) 09.CJ.25 [no]
  13. Aleksite (IMA1977-038) 02.GC.40a
    (IUPAC: Lead dibismuth ditelluride disulfide)
  14. Alexkhomyakovite (IMA2015-013) 05.DA.?? [no] [no]
  15. Alflarsenite (IMA2008-023) 09.G?
  16. Alforsite (IMA1980-039) 08.BN.05
    (IUPAC: Pentabarium triphosphate chloride)
  17. Alfredopetrovite (IMA2015-026) 04.??. [no] [no]
  18. Alfredstelznerite (IMA2007-050) 06.D0.??
  19. Algodonite (Y: 1857) 02.AA.10a
  20. Aliettite (Y: 1968? Rd) 09.EC.60
  21. Allabogdanite (IMA2000-038) 01.BD.15 [no]
  22. Allactite (IMA1980 s.p., 1884) 08.BE.30
    (IUPAC: Dimanganese(II) diarsenate octahydroxyl)
  23. Allanite 09.BG.05b
    1. Allanite-(Ce) (IMA1987 s.p., 1811) 09.BG.05b
    2. Allanite-(La) (IMA2003-065) 09.BG.05b
    3. Allanite-(Nb) (IMA2010-060) 09.BG.05b [no] [no]
    4. Allanite-(Y) (IMA1966 s.p., 1949) 09.BG.05b [no]
  24. Allanpringite (IMA2004-050) 08.DC.50 [no]
    (IUPAC: Triiron(III) diphosphate trihydrohyl pentahydrate)
  25. Allargentum (IMA1970 s.p., 1950 Rd) 02.AA.30
  26. Alleghanyite (Y: 1932) 09.AF.45
  27. Allendeite (IMA2007-027) 04.?? [no]
  28. Allochalcoselite (IMA2004-025) 04.JG.40
  29. Alloclasite (Y: 1865) 02.EB.10b
    (IUPAC: Cobalt arsenic sulfide)
  30. Allophane (Y: 1816) 09.ED.20
  31. Alloriite (IMA2006-020) 09.FB.05
  32. Alluaivite (IMA1988-052) 09.CO.10
  33. Alluaudite (IMA1979 s.p., 1848 Rd) 08.AC.10
  34. Almandine (Y: old/ 1546?) 09.AD.25
  35. Almarudite (IMA2002-048) 09.CM.05 [no]
  36. Almeidaite (IMA2013-020) 04.C? [no] [no]
  37. Alnaperbøeite-(Ce) (IMA2012-054) 09.B? [no] [no]
  38. Alpeite (IMA2016-072) 09.B?. [no] [no]
  39. Alpersite (IMA2003-040) 07.CB.35 [no] [no]
  40. Alsakharovite-Zn (IMA2002-003) 09.CE.30h [no]
  41. Alstonite (Y: 1841) 05.AB.35
    (IUPAC: Barium calcium dicarbonate)
  42. Altaite (Y: 1845) 02.CD.10
    (IUPAC: Lead telluride)
  43. Althausite (IMA1974-050) 08.BB.25
    (IUPAC: Dimagnesium phosphate hydroxyl)
  44. Althupite (IMA1986-003) 08.EC.25
  45. Altisite (IMA1993-055) 09.DP.40 [no]
  46. Alum (chemical compound)
    1. Alum-(K) (IMA2007 s.p., 1951) 07.CC.20
      (IUPAC: Potassium aluminium disulfate dodecahydrate)
    2. Alum-(Na) (IMA2007 s.p., 1951) 07.CC.20
      (IUPAC: Sodium aluminium disulfate dodecahydrate)
  47. Aluminite (Y: old/ 1805) 07.DC.05
    (IUPAC: Dialuminium sulfate tetrahydroxyl heptahydrate)
  48. Aluminium (IMA1980-085a) 01.AA.05
  49. Aluminoceladonite (IMA1998 s.p.) 09.EC.15 [no]
  50. Aluminocerite-(Ce) (IMA2007-060) 09.AG.20 [no]
  51. Aluminocopiapite (Y: 1947) 07.DB.35
  52. Aluminocoquimbite (IMA2009-095) 07.CB.50 [no]
    (IUPAC: Aluminium iron trisulfate nonahydrate)
  53. Aluminomagnesiohulsite (IMA2002-038) 06.AB.45 [no]
  54. Aluminopyracmonite (IMA2012-075) 07.?? [no] [no]
    (IUPAC: Triammonium aluminium trisulfate)
  55. Alumovesuvianite (IMA2016-014) 09.B? [no] [no]
  56. Alumoåkermanite (IMA2008-049) 09.BB.10
  57. Alumohydrocalcite (IMA1980 s.p., 1926) 05.DB.05
    (IUPAC: Calcium dialuminium dicarbonate tetrahydroxyl trihydrate)
  58. Alumoklyuchevskite (IMA1993-004) 07.BC.45
  59. Alumotantite (IMA1980-025) 04.DB.55
    (IUPAC: Aluminium tantalum tetraoxide)
  60. Alunite (IMA1987 s.p., 1565 Rd) 07.BC.10
    (IUPAC: Potassium trialuminium disulfate hexahydroxyl)
  61. Alunogen (Y: 1832) 07.CB.45
  62. Alvanite (IMA1962 s.p., 1959) 08.FE.05
  63. Alwilkinsite-(Y) (IMA2015-097) 07.?? [no] [no]
  64. Amakinite (IMA1967 s.p., 1962) 04.FE.05
    (IUPAC: Iron(II) dihydroxide)
  65. Amarantite (Y: 1888) 07.DB.30
  66. Amarillite (Y: 1933) 07.CC.75
    (IUPAC: Sodium iron(III) disulfate hexahydrate)
  67. Amblygonite (Y: 1818) 08.BB.05
    (IUPAC: Lithium aluminium phosphate fluorid)
  68. Ambrinoite (IMA2009-071) 02.HE.10 [no] [no]
  69. Ameghinite (IMA1966-034) 06.CA.10
  70. Amesite (Y: 1876) 09.ED.15
  71. Amicite (IMA1979-011) 09.GC.05
  72. Aminoffite (Y: 1937) 09.BH.05
  73. Ammineite (IMA2008-032) 03.CO.?? [no] [no]
    (IUPAC: Copper dichloride diammine)
  74. Ammonioalunite (IMA1986-037) 07.BC.10
    (IUPAC: Ammonium trialuminium disulfate hexahydroxyl)
  75. Ammonioborite (Y: 1931) 06.EA.15
  76. Ammoniojarosite (IMA1987 s.p., 1927 Rd) 07.BC.10
    (IUPAC: Ammonium triiron(III) disulfate hexahydroxyl)
  77. Ammonioleucite (IMA1984-015) 09.GB.05
  78. Ammoniomagnesiovoltaite (IMA2009-040) 07.CC.25 [no]
    (For an overview of the amphibole supergroup see here)
  79. Amstallite (IMA1986-030) 09.DP.25
  80. Analcime (IMA1997 s.p., 1797) 09.GB.05
  81. Anandite (IMA1966-005) 09.EC.35
  82. Anapaite (Y: 1902) 08.CH.10
    (IUPAC: Dicalcium iron(II) diphosphate tetrahydrate)
  83. Anatase (IMA1962 s.p., 1801) 04.DD.05
    (IUPAC: Titanium dioxide)
  84. Anatolyite (IMA2016-040) 08.?? [no] [no]
  85. Ancylite 05.DC.05
    1. Ancylite-(Ce) (IMA1987 s.p., 1901) 05.DC.05
      (IUPAC: Cerium strontium dicarbonate hydroxyl monohydrate)
    2. Ancylite-(La) (IMA1995-053) 05.DC.05
      (IUPAC: Lanthanum strontium dicarbonate hydroxyl monohydrate)
  86. Andalusite (Y: 1798) 09.AF.10
  87. Andersonite (Y: 1951) 05.ED.30
  88. Andorite 02.JB.40a
    1. Andorite IV (quatrandorite and sundtit, Y: 1893, 1954) 02.JB.40a
    2. Andorite VI (senandorite, Y: 1892) 02.JB.40a [no]
  89. Andradite (Y: 1800) 09.AD.25
  90. Andreadiniite (IMA2014-049) 02.??. [no] [no]
    (CuHgAg7Pb7Sb24S48)
  91. Andrémeyerite (IMA1972-005) 09.BB.20
  92. Andreyivanovite (IMA2006-003) 01.BD.15 [no]
    (IUPAC: Iron chromium phosphide)
  93. Andrianovite (IMA2007-008) 09.CO.10 [no] [no]
  94. Anduoite (Y: 1979) 02.EB.15a
    (IUPAC: Ruthenium diarsenide)
  95. Andychristyite (IMA2015-024) 04.??. [no] [no]
  96. Andyrobertsite (IMA1997-023) 08.DH.50
  97. Angarfite (IMA2010-082) 08.?? [no]
  98. Angastonite (IMA2008-008) 08.DL.25 [no]
    (IUPAC: Calcium magnesium dialuminium diphosphate tetrahydroxyl heptahydrate)
  99. Ángelaite (IMA2003-064) 02.JB.25f [no]
    (IUPAC: Dicopper silver lead bismuth tetrasulfide)
  100. Angelellite (IMA1962 s.p., 1959) 08.BC.05
  101. Anglesite (Y: 1832) 07.AD.35
    (IUPAC: Lead sulfate)
  102. Anhydrite (Y: 1795) 07.AD.30
    (IUPAC: Anhydrous calcium sulfate)
  103. AnhydrokainiteQ (Y: 1912) 07.BC.80 [no] [no]
    (IUPAC: Potassium magnesium sulfate chloride)
  104. Anilite (IMA1968-030) 02.BA.10
    (IUPAC: Heptacopper tetrasulfide)
  105. Ankerite (Y: 1825) 05.AB.10
    (IUPAC: Calcium iron(II) dicarbonate)
  106. Ankinovichite (IMA2002-063) 08.FE.05
  107. Annabergite (Y: 1852) 08.CE.40
    (IUPAC: Trinickel diarsenate octahydrate)
  108. Annite (IMA1998 s.p., 1868) 09.EC.20
  109. AnniviteQ (IMA2008 s.p., 1854) 02.?? [no] [no]
    Note: it might be a Bi-rich variety of tennantite (Moëlo et al., 2008; Gołębiowska et al., 2012).
  110. Anorpiment (IMA2011-014) 02.?? [no]
    (IUPAC: Diarsenic trisulfide)
  111. Anorthite (Y: 1824) 09.FA.35
  112. AnorthoclaseI (Y: 1885) 09.FA.30
  113. Anorthominasragrite (IMA2001-040) 07.DB.20 [no]
  114. Ansermetite (IMA2002-017) 04.HD.30 [no]
  115. Antarcticite (IMA1965-015) 03.BB.30
    (IUPAC: Calcium dichloride hexahydrate)
  116. Anthoinite (Y: 1947) 07.GB.35
  117. Anthonyite (IMA1967 s.p., 1946) 03.DA.40
    (IUPAC: Copper(II) hydroxide trihydrate)
  118. Anthophyllite [amphibole: IMA2012 s.p., 1801 Rd] 09.DE.05
  119. Antigorite (IMA1998 s.p., 1840 Rd) 09.ED.15
  120. Antimonselite (IMA1992-003) 02.DB.05
    (IUPAC: Diantimony triselenide)
  121. Antimony (Y: 1748) 01.CA.05
  122. Antipinite (IMA2014-027) 10.?? [no] [no]
  123. Antlerite (IMA1968 s.p., 1889) 07.BB.15
    (IUPAC: Tricopper(II) sulfate tetrahydroxyl)
  124. Anyuiite (IMA1987-053) 01.AA.15
    (IUPAC: Gold dilead alloy)
  125. Anzaite-(Ce) (IMA2013-004) 04.?? [no] [no]
    Chemical formula: Ce4Fe2+Ti6O18(OH)2

Ap – Ar

  1. Apachite (IMA1979-022) 09.HE.10
    (For the apatite series, see hydroxylapatite, fluorapatite, and chlorapatite)
  2. Apexite (IMA2015-002) 08.??. [no] [no]
    (IUPAC: Sodium magnesium phosphate nonahydrate)
  3. Aphthitalite (Y: 1813) 07.AC.35
    (IUPAC: Tripotassium sodium disulfate)
  4. Apjohnite (Y: 1847) 07.CB.85
  5. Aplowite (IMA1963-009) 07.CB.15
    (IUPAC: Cobalt(II) sulfate tetrahydrate)
  6. Apuanite (IMA1978-069) 04.JA.25
  7. Aqualite (IMA2002-066) 09.CO.10
  8. Aradite (IMA2013-047) 08.?? [no] [no]
    (Chemical formula: BaCa6[(SiO4)(PO4)](VO4)2F)
  9. Aragonite (Y: 1788) 05.AB.15
    (IUPAC: Calcium carbonate)
  10. Arakiite (IMA1998-062) 08.BE.45
  11. Aramayoite (Y: 1926) 02.HA.25
  12. Arangasite (IMA2012-018) 08.?? [no]
    (IUPAC: Dialuminium sulfate phosphate fluoride (7.5)hydrate)
  13. Arapovite (IMA2003-046) 09.CH.10
  14. Aravaipaite (IMA1988-021) 03.DC.35
    (IUPAC: Trilead aluminium nonafluoride monohydrate)
  15. Arcanite (Y: 1845) 07.AD.05
    (IUPAC: Dipotassium sulfate)
  16. Archerite (IMA1975-008) 08.AD.15
    (IUPAC: Potassium phosphoric acid)
  17. Arctite (IMA1980-049) 08.BN.10
    (IUPAC: Pentasodium heptacalcium barium hexaphosphate trifluoride)
  18. Arcubisite (IMA1973-009) 02.LA.40
    (IUPAC: Hexasilver copper bismuth tetrasulfide)
  19. Ardaite (IMA1979-073) 02.LB.30
  20. Ardealite (Y: 1932) 08.CJ.50
  21. Ardennite 09.BJ.40
    1. Ardennite-(As) (IMA2007 s.p., 1872) 09.BJ.40
    2. Ardennite-(V) (IMA2005-037) 09.BJ.40
  22. Arfvedsonite [amphibole: IMA2012 s.p., arfwedsonite (1823) Rd] 09.DE.25
  23. Argandite (IMA2010-021) 08.BE.30 [no] [no]
    (IUPAC: Heptamanganese divanadate octahydroxyl)
  24. Argentobaumhauerite (IMA2015-F, IMA1988-051) 02.HC.05b
  25. Argentodufrénoysite (IMA2016-046) 02.?? [no] [no]
  26. Argentojarosite (IMA1987 s.p., 1923 Rd) 07.BC.10
    (IUPAC: Silver triiron(III) disulfate hexahydroxyl)
  27. Argentoliveingite (IMA2016-029) 02.?? [no] [no]
  28. Argentopentlandite (IMA1970-047) 02.BB.15
  29. Argentopyrite (Y: 1866) 02.CB.65
    (IUPAC: Silver diiron trisulfide)
  30. Argentotennantite (IMA1985-026) 02.GB.05
  31. Argentotetrahedrite (IMA2016-093) 02.?? [no] [no]
  32. Argesite (IMA2011-072) 03.?? [no] [no]
  33. Argutite (IMA1980-067) 04.DB.05
    (IUPAC: Germanium dioxide)
  34. Argyrodite (Y: 1886) 02.BA.70
    (IUPAC: Octasilver germanium hexasulfide)
  35. Arhbarite (IMA1981-044) 08.BE.25
    (IUPAC: Dicopper magnesium arsenate trihydroxyl)
  36. Ariegilatite (IMA2016-100) 09.A?. [no] [no]
  37. Arisite 05.BD.18
    1. Arisite-(Ce) (IMA2009-013) 05.BD.18 [no]
    2. Arisite-(La) (IMA2009-019) 05.BD.18 [no]
  38. Aristarainite (IMA1973-029) 06.FB.05
  39. Armalcolite (IMA1970-006 Rd) 04.CB.15
  40. Armangite (Y: 1920) 04.JB.20
  41. Armbrusterite (IMA2005-035) 09.EG.65 [no]
  42. Armenite (Y: 1939) 09.CM.05
  43. Armstrongite (IMA1972-018) 09.EA.35
  44. Arrojadite 08.BF.05
    Note: arrojadite group, see here as well.
    1. Arrojadite-(BaFe) (IMA1994-033) 08.BF.05
    2. Arrojadite-(BaNa) (IMA2014-071) 08.BF.05 [no] [no]
    3. Arrojadite-(KFe) (IMA2005 s.p., 1925) 08.BF.05
    4. Arrojadite-(KNa) (IMA2005-047) 08.BF.05
    5. Arrojadite-(PbFe) (IMA2005-056) 08.BF.05 [no]
    6. Arrojadite-(SrFe) (IMA2005-032) 08.BF.05 [no]
  45. Arsenatrotitanite (IMA2016-015) 08.?? [no] [no]
  46. Arsenbrackebuschite (IMA1977-014) 08.BG.05
  47. Arsendescloizite (IMA1979-030) 08.BH.35
  48. Arsenic (Y: old) 01.CA.05
  49. Arseniopleite (IMA1967 s.p., 1888) 08.AC.10
  50. Arseniosiderite (Y: 1842) 08.DH.30
  51. Arsenmarcobaldiite (IMA2016-045) 02.?? [no] [no]
  52. Arsenmedaite (IMA2016-099) 09.B?. [no] [no]
  53. Arsenoclasite (Y: 1931) 08.BD.10
    (IUPAC: Pentamanganese(II) diarsenate tetrahydroxyl)
  54. Arsenocrandallite (IMA1980-060) 08.BL.10
  55. Arsenoflorencite 08.BL.13
    1. Arsenoflorencite-(Ce) (IMA1985-053) 08.BL.13
    2. Arsenoflorencite-(La) (IMA2009-078) 08.BL.13
  56. Arsenogorceixite (IMA1989-055) 08.BL.10
  57. Arsenogoyazite (IMA1983-043) 08.BL.10
  58. Arsenohauchecornite (IMA1978-E) 02.BB.10
  59. Arsenohopeite (IMA2010-069) 08.?? [no]
    (IUPAC: Trizinc diarsenate tetrahydrate)
  60. Arsenolamprite (Y: 1886) 01.CA.10
  61. Arsenolite (Y: 1854) 04.CB.50
    (IUPAC: Diarsenic trioxide)
  62. Arsenopalladinite (IMA1973-002a, 1957 Rd) 02.AC.10c
  63. Arsenopyrite (IMA1962 s.p., 1847) 02.EB.20
    (IUPAC: Iron arsenide sulfide)
  64. Arsenovanmeerscheite (IMA2006-018) 08.EC.20 [no]
  65. Arsenowagnerite (IMA2014-100) 08.??. [no] [no]
    (IUPAC: Dimagnesium arsenate fluoride)
  66. Arsenquatrandorite (IMA2012-087) 02.?? [no] [no]
  67. Arsentsumebite (Y: 1935?) 08.BG.05
  68. Arsenuranospathite (IMA1982 s.p.?, 1978) 08.EB.25
  69. Arsenuranylite (Y: 1958) 08.EC.10
  70. Arsiccioite (IMA2013-058) 02.??. [no]
    (IUPAC: Silver dimercury thallium diarsenide hexasulfide)
  71. Arsmirandite (IMA2014-081) 08.??. [no] [no]
  72. Arthurite (IMA1964-002) 08.DC.15
  73. Artinite (Y: 1902) 05.DA.10
    (IUPAC: Dimagnesium carbonate dihydroxyl trihydrate)
  74. Artroeite (IMA1993-031) 03.CC.15
  75. Artsmithite (IMA2002-039) 08.BO.40
  76. Arupite (IMA1988-008) 08.CE.40
    (IUPAC: Trinickel diphosphate octahydrate)
  77. ArzakiteN (Y: 1985) 02.FC.15a
  78. ArzruniteQ (Y: 1899) 07.?? [no] [no]
    Note: It might be a mixture.

As – Az

  1. Asbecasite (IMA1965-037) 04.JB.30
  2. Asbolane (Y: 1841) 04.FL.30
  3. Aschamalmite (IMA1982-089) 02.JB.40b
  4. Ashburtonite (IMA1990-033) 09.CF.05
  5. Ashcroftine-(Y) (IMA1967 s.p., 1933) 09.DN.15
  6. Ashoverite (IMA1986-008) 04.FA.10
    (IUPAC: Zinc dihydroxide)
  7. Asisite (IMA1987-003) 03.DB.40
  8. Åskagenite-(Nd) (IMA2009-073) 09.BG.05b [no]
  9. Aspedamite (IMA2011-056) 04.?? [no]
  10. Aspidolite (IMA2004-049 Rd) 09.EC.20 [no]
  11. Asselbornite (IMA1980-087) 08.ED.10
  12. Astrocyanite-(Ce) (IMA1989-032) 05.EF.05
  13. Astrophyllite (Y: 1854) 09.DC.05
  14. Atacamite (Y: 1803) 03.DA.10a
    (IUPAC: Dicopper chloride trihydroxyl)
  15. Atelestite (Y: 1832) 08.BO.15
  16. Atelisite-(Y) (IMA2010-065) 09.?? [no]
  17. Atencioite (IMA2004-041) 08.DA.10 [no]
  18. Athabascaite (IMA1969-022) 02.BA.25
    (IUPAC: Pentacopper tetraselenide)
  19. Atheneite (IMA1973-050) 02.AC.05a
    (IUPAC: Dipalladium arsenide)
  20. Atlasovite (IMA1986-029) 07.BC.20
  21. Atokite (IMA1974-041) 01.AG.10
  22. Attakolite (IMA1992 s.p., 1868 Rd) 08.BH.60
  23. Attikaite (IMA2006-017) 08.DJ.45
  24. Aubertite (IMA1978-051) 07.DB.05
  25. Augelite (Y: 1868) 08.BE.05
    (IUPAC: Dialuminium phosphate trihydroxyl)
  26. AugiteI (IMA1988 s.p., 1792) 09.DA.15
  27. Auriacusite (IMA2009-037) 08.BB.30 [no]
  28. Aurichalcite (Y: 1839) 05.BA.15
    (IUPAC: Pentazinc dicarbonate hexahydroxyl)
  29. Auricupride (Y: 1950) 01.AA.10a
  30. Aurihydrargyrumite (IMA2017-003) 01.AD.?? [no] [no]
  31. Aurivilliusite (IMA2002-022) 03.DD.50
  32. Aurorite (IMA1966-031) 04.FL.20
  33. Aurostibite (Y: 1952) 02.EB.05a
    (IUPAC: Gold diantimonide)
  34. Austinite (Y: 1935) 08.BH.35
    (IUPAC: Calcium zinc arsenate hydroxyl)
  35. Autunite (Y: 1852) 08.EB.05
    (IUPAC: Calcium diuranyl diphosphate undecahydrate)
  36. Avdoninite (IMA2005-046a) 03.DA.55
  37. Averievite (IMA1995-027) 08.BB.85
  38. Avicennite (Y: 1958) 04.CB.10
    (IUPAC: Dithallium trioxide)
  39. Avogadrite (Y: 1926) 03.CA.10
    (IUPAC: Potassium boron tetrafluoride)
  40. Awaruite (Y: 1885) 01.AE.20
  41. Axinite 09.BD.20
    1. Axinite-(Fe) (IMA1968 s.p., 1911) 09.BD.20
    2. Axinite-(Mg) (IMA1975-025) 09.BD.20
    3. Axinite-(Mn) (Y: 1909) 09.BD.20
  42. Azoproite (IMA1970-021) 06.AB.30
  43. Azurite (Y: old/ 1824) 05.BA.05
    (IUPAC: Tricopper dicarbonate dihydroxyl)
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