| Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
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| Ashburtonite | Pb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2O |
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| 'Ashcroftine-(Ce)' | K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8 · 8H2O |
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| Ashcroftine-(Y) | K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2O |
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| Ashoverite | Zn(OH)2 |
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| 'Askanite' | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
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| Aspedamite | ◻ 12(Fe3+2Fe2+)Nb4(ThNb9Fe3+2 Ti4+O42)(H2O)9(OH)3 |
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| 'Asperolite' | near CuSiO3 · 3H2O |
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| Aspidolite | NaMg3(AlSi3O10)(OH)2 |
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| Asselbornite | Pb(BiO)3(UO2)4(AsO4)2(OH)7 · 4H2O |
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| 'Astochite' | {Na}{Na(Ca,Mn)}{Mg5}(Si8O22)(OH)2 |
|---|
| Astrocyanite-(Ce) | Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O |
|---|
| 'Astrolite' | KAl2(AlSi3O10)(OH)2 |
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| Astrophyllite | K2NaFe72+Ti2Si8O26(OH)4F |
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| Atacamite | Cu2(OH)3Cl |
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| Atelestite | Bi2(AsO4)O(OH) |
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| 'Atelestite Group' | Bi2OXO4(OH) |
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| Atelisite-(Y) | Y4Si3O8(OH)8 |
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| Atencioite | Ca2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O |
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| 'Atheriastite' | near Ca5MgFeAl6Si8O32 · 5H2O |
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| 'Atlaserz' | Cu2(CO3)(OH)2 |
|---|
| 'Atlasite' | near Cu15(CO3)6Cl2(OH)16 · H2O |
|---|
| 'Atopite' | (Ca,Na)2Sb2(O,F,OH)7 |
|---|
| Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 |
|---|
| Attikaite | Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O |
|---|
| Aubertite | CuAl(SO4)2Cl · 14H2O |
|---|
| Augelite | Al2(PO4)(OH)3 |
|---|
| Aurichalcite | (Zn,Cu)5(CO3)2(OH)6 |
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| Aurorite | Mn2+Mn34+O7 · 3H2O |
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| Austinite | CaZn(AsO4)(OH) |
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| Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
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| 'Autunite Group' | A(UO2)2(TO4)2 · 8-16H2O |
|---|
| 'Avalite' | KAl2(AlSi3O10)(OH)2 |
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| 'Avasite' | 5Fe2O3 · 2SiO2 · 9H2O |
|---|
| Avdeevite | NaAl4(Be5Li)(Si6O18)2(H2O)1-2 |
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| Avdoninite | K2Cu5(OH)4Cl8 · H2O |
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| Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
|---|
| Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
|---|
| Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
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| 'Azovskite' | Fe33+(PO4)(OH)6 or near |
|---|
| Azurite | Cu3(CO3)2(OH)2 |
|---|
| 'Ba-Mordenite' | near BaAl2Si10O24 · 7H2O |
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| Babánekite | Cu3(AsO4)2 · 8H2O |
|---|
| Babefphite | BaBePO4(F,OH) |
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| Babingtonite | Ca2(Fe,Mn)FeSi5O14(OH) |
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| 'Babingtonite-Manganbabingtonite Series' | Ca2(Fe2+,Mn)Fe3+Si5O14(OH) |
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| 'Bacalite' | C10H16O + (H2S) |
|---|
| Bafertisite | Ba2Fe42+Ti2(Si2O7)2O2(OH)2F2 |
|---|
| 'Bafertisite Group' | APDPM4OM2H(Si2O7)2(XMO)2(XAO)2XMP |
|---|
| 'Bagrationite (of Koksharov)' | {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH) |
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