| Abswurmbachite | |
| Agardite-(Ce) | |
| 'Agardite-(Dy)' | | (Dy,La)Cu | | [(OH) | | |(AsO | | ) | | ] · 3H | | O |
|
| Agardite-(La) | | (La,Ce)Cu | | [(OH) | | |(AsO | | ) | | ] · 3H | | O |
|
| 'Agardite-(Nd)' | | (Nd,La,Ce)Cu | | [(OH) | | |(AsO | | ) | | ] · 3H | | O |
|
| Agardite-(Y) | | (Y,Ca)Cu | | [(OH) | | |(AsO | | ,HAsO | | )|(AsO | | ) | | ] · 3H | | O |
|
| Aikinite | |
| Ajoite | | (K,Na)Cu | | [(OH) | | |AlSi | | O | | ] · 3H | | O |
|
| 'Aktashite' | |
| Algodonite | |
| 'Alisonite' | |
| Allochalcoselite | |
| Alpersite | |
| 'Alumo-chalcosiderite' | |
| Alumoklyuchevskite | |
| Andyrobertsite | |
| Angelaite | |
| Anilite | |
| Anthonyite | |
| Antlerite | |
| Apachite | |
| 'Apthonite' | |
| Arcubisite | |
| 'Argentoaikinite' | |
| 'Argentoalgodonite' | |
| 'Argentocuproauride' | |
| 'Argentocuproaurite' | |
| 'Argentocuproaurite-I' | |
| 'Argentocuproaurite-II' | |
| 'Argentocuprocosalite' | |
| 'Argentodomeykite' | |
| Argentotennantite | |
| 'Argyrodite Group' | | A | | B | | X | | Y | | where A = Ag | | , Cu | | , Cd | | , etc·; B = Ga | | , Si | | , Ge | | , Sn | | , P | | , etc·; X = S, Se, Te; Y = Cl, Br, I |
|
| Arhbarite | |
| 'Arsenian Renierite' | |
| 'Arsenosulvanite' | |
| Arsentsumebite | |
| Arthurite | | CuFe | | [(OH,O)|(AsO | | ,PO | | ,SO | | )] | | · 4H | | O |
|
| 'Arzrunite' | |
| Ashburtonite | | Pb | | Cu | | [(OH) | | |Cl|(HCO | | ) | | |Si | | O | | ] · H | | O |
|
| 'Asperolite' | |
| Astrocyanite-(Ce) | | Cu | | (Ce,Nd,La) | | (UO | | )[(OH) | | |(CO | | ) | | ] · 1.5H | | O |
|
| Atacamite | |
| Athabascaite | |
| 'Atlasite' | |
| Atlasovite | |
| Attikaite | |
| Aubertite | |
| Auriacusite | |
| Aurichalcite | |