| Actinolite | |
| 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 | |
| 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 | |
| 'Aloisiite' | |
| '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 | |
| Aluminotaramite | | Na[CaNa][Fe | | Al | | ][(OH) | | |Al | | Si | | O | | ] |
|
| 'Alumo-chalcosiderite' | |
| 'Alumogoethite' | |
| 'Alumolimonite' | |
| Amakinite | |
| Amarantite | |
| Amarillite | |
| Ammoniojarosite | |
| Anandite | | (Ba,K)(Fe | | ,Mg) | | [(O,OH) | | |(Si,Al,Fe) | | O | | ] |
|
| Anapaite | |
| Annite | |
| Antigorite | |
| 'Antillite' | |
| 'Apatelite' | |
| 'Aphrosiderite' | |
| 'Aquacreptite (of Shepard)' | | Mg | | Fe | | Si | | O | | ·8H | | O with some Al | | O | | , or near· |
|
| Arakiite | | (Zn,Mn | | )(Mn | | ,Mg) | | (Fe | | ,Al) | | (AsO | | )(AsO | | ) | | (OH) | | |
|
| Ardennite-(V) | | Mn | | [Al | | (Mg,Al,Fe | | ,Mn | | ) | | ][(OH) | | |(VO | | ,SiO | | )|(SiO | | ) | | |Si | | O | | ] |
|
| Arfvedsonite | |
| Argentojarosite | |
| Arrojadite-(BaFe) | | {Ba[ ]}{Fe | | [ ]}{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| 'Arrojadite-(BaNa)' | | {Ba[ ]}{Na | | }{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| Arrojadite-(KFe) | | {KNa}{Fe | | [ ]}{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| 'Arrojadite-(KFeNa)' | | {KNa}{Fe | | [ ]}{Ca}{Na | | }{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| Arrojadite-(KNa) | | {KNa}{Na | | }{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| 'Arrojadite-(NaFe)' | | {Na | | }{Fe | | [ ]}{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| Arrojadite-(PbFe) | | {Pb[ ]}{Fe | | [ ]}{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| Arrojadite-(SrFe) | | {Sr[ ]}{Fe | | [ ]}{Ca}{Na | | [ ]}{Fe | | }{Al}[(OH) | | |HPO | | |(PO | | ) | | ] |
|
| Arsenbrackebuschite | |
| Arseniosiderite | |
| Arthurite | | CuFe | | [(OH,O)|(AsO | | ,PO | | ,SO | | )] | | · 4H | | O |
|