| 'Aciculite' | |
| Actinolite | |
| Aegirine | |
| 'Aegirine-augite' | |
| Aenigmatite | |
| Aerinite | | Ca | | (Fe | | ,Al,Fe | | ,Mg)(Al,Mg) | | [HSi | | O | | (OH) | | ][(CO | | ) | | (H | | O) | | ] |
|
| Aeschynite-(Ce) | | (Ce,Ca,Fe,Th)(Ti,Nb) | | (O,OH) | | |
|
| Aeschynite-(Y) | | (Y,Ca,Fe,Th)(Ti,Nb) | | (O,OH) | | |
|
| Aheylite | | (Fe | | ,Zn)Al | | [(OH) | | |(PO | | ) | | ] | | · 4H | | O |
|
| Akaganeite | |
| Akatoreite | |
| Akimotoite | |
| Allanite-(Ce) | | {CaCe}{Al | | Fe | | }[O|OH|SiO | | |Si | | O | | ] |
|
| Allanite-(La) | | {CaLa}{Al | | Fe | | }[O|OH|SiO | | |Si | | O | | ] |
|
| Allanite-(Y) | | {CaY}{Al | | Fe | | }[O|OH|SiO | | |Si | | O | | ] |
|
| Allanpringite | |
| Alluaudite | | (Na,Ca)Mn | | (Fe | | ,Mn | | ,Fe | | ,Mg) | | (PO | | ) | | |
|
| 'Alluaudite-Ca□' | |
| 'Alluaudite-NaNa' | |
| 'Alluaudite-Na□' | |
| Almandine | |
| Almarudite | | K([],Na) | | (Mn | | ,Fe | | ,Mg) | | (Be,Al) | | [Si | | O | | ] |
|
| 'Almbosite' | |
| 'Aloisiite' | |
| 'Aluminian Britholite' | | (Ca,Ce,Y) | | (Al,Fe) | | [(Si,Al,P) | | ] | | (F,O) |
|
| 'Aluminian Chromite' | |
| 'Aluminian Hisingerite' | |
| 'Aluminian nontronite' | |
| 'Alumino-ferro-hornblende' | |
| 'Alumino-ferrobarroisite' | | ☐[CaNa][Fe | | Al | | ][(OH) | | |AlSi | | O | | ] |
|
| Aluminoceladonite | | K(Mg,Fe | | )(Al,Fe | | )[(OH) | | |Si | | O | | ] |
|
| Aluminocerite-(Ce) | | (Ce,La,Ca) | | (Al,Fe | | )(SiO | | ) | | [SiO | | (OH)] | | (OH) | | |
|
| Aluminocopiapite | |
| Aluminomagnesiohulsite | |
| Aluminotaramite | | Na[CaNa][Fe | | Al | | ][(OH) | | |Al | | Si | | O | | ] |
|
| 'Alumo-chalcosiderite' | |
| 'Alumo-chrompicotite' | |
| 'Alumoberezovite' | |
| 'Alumogoethite' | |
| 'Alumohematite' | |
| Alumoklyuchevskite | |
| 'Alumolimonite' | |
| Amakinite | |
| Amarantite | |
| Amarillite | |
| Ammoniojarosite | |
| Anandite | | (Ba,K)(Fe | | ,Mg) | | [(O,OH) | | |(Si,Al,Fe) | | O | | ] |
|
| Anapaite | |
| Andradite | |
| Andrémeyerite | |