| Abenakiite-(Ce) | |
| Abswurmbachite | |
| 'Acarbodavyne' | |
| Actinolite | |
| 'Adularia' | |
| Aegirine | |
| 'Aegirine-augite' | |
| Aenigmatite | |
| Aerinite | | Ca | | (Fe | | ,Al,Fe | | ,Mg)(Al,Mg) | | [HSi | | O | | (OH) | | ][(CO | | ) | | (H | | O) | | ] |
|
| 'Afanasievaite' | |
| 'Afanasyevaite' | |
| Afghanite | | (Na,Ca,K) | | [(Cl | | ,SO | | ,CO | | ) | | |Al | | Si | | O | | ] · 0.5H | | O |
|
| Afwillite | |
| 'Ag-Analcite' | |
| 'Agate' | |
| Agrellite | |
| Ajoite | | (K,Na)Cu | | [(OH) | | |AlSi | | O | | ] · 3H | | O |
|
| Akatoreite | |
| Åkermanite | |
| Akimotoite | |
| Alamosite | |
| Albite | |
| 'Albovite' | |
| Aleksandrovite | |
| 'Alexandrolite' | |
| Alflarsenite | |
| Aliettite | |
| 'Alipite' | |
| 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 | | ] |
|
| Alleghanyite | |
| Allophane | |
| 'Allophite' | |
| Alloriite | | (Na,Ca,K) | | Ca | | [Cl | | |(SO | | ) | | |(Al | | Si | | O | | ) | | ] |
|
| Alluaivite | | Na | | (Ca,Mn) | | (Ti,Nb) | | Si | | O | | Cl·2H | | O |
|
| Almandine | |
| Almarudite | | K([],Na) | | (Mn | | ,Fe | | ,Mg) | | (Be,Al) | | [Si | | O | | ] |
|
| 'Almbosite' | |
| 'Aloisiite' | |
| Alsakharovite-Zn | | NaSrKZn(Ti,Nb) | | (Si | | O | | ) | | (O,OH) | | · 7H | | O |
|
| Altisite | |
| 'Aluminian Britholite' | | (Ca,Ce,Y) | | (Al,Fe) | | [(Si,Al,P) | | ] | | (F,O) |
|
| 'Aluminian Hisingerite' | |
| 'Aluminian nontronite' | |
| 'Aluminium Montmorillonite' | |
| 'Alumino-ferro-hornblende' | |
| 'Alumino-ferrobarroisite' | | ☐[CaNa][Fe | | Al | | ][(OH) | | |AlSi | | O | | ] |
|
| 'Alumino-magnesio-hornblende' | |
| Alumino-Magnesiotaramite | | Na[CaNa][Mg | | Al | | ][(OH) | | |Al | | Si | | O | | ] |
|