| Jahnsite-(MnMnMn) | {Mn2+}{Mn2+}{Mn22+}{Fe23+}(PO4)4(OH)2 · 8H2O |
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| Jahnsite-(MnMnZn) | Mn2+Mn2+Zn2Fe23+(PO4)4(OH)2 · 8H2O |
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| Jahnsite-(NaFeMg) | NaFe3+Mg2Fe23+(PO4)4(OH)2 · 8H2O |
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| Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe23+}(PO4)4(OH)2 · 8H2O |
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| Jahnsite-(NaMnMn) | NaMn2+(Mn2+Fe3+)Σ2Fe23+(PO4)4(OH)2 · 8H2O |
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| Jamesite | Pb2Zn(Fe2+,Zn)2Fe43+(AsO4)4(OH)10 |
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| Janggunite | Mn5-x(Mn,Fe)1+xO8(OH)6 |
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| Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 |
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| Jarosite | KFe33+(SO4)2(OH)6 |
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| Jeanbandyite | Fex3+Fe2+1-xSn(OH)6-xOx |
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| 'Jenkinsite' | (Mg,Fe2+)3(Si2O5)(OH)4 |
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| Jimthompsonite | (Mg,Fe)5Si6O16(OH)2 |
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| Jinshajiangite | BaNaFe42+Ti2(Si2O7)2O2(OH)2F |
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| Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O |
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| Joesmithite | Pb2+Ca2(Mg3Fe23+)(Si6Be2)O22(OH)2 |
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| Johntomaite | BaFe22+Fe23+(PO4)3(OH)3 |
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| Johnwalkite | K(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH) |
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| Juanitaite | (Cu,Ca,Fe)10Bi(AsO4)4(OH)11 · 2H2O |
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| 'Julgoldite Subgroup' | Ca2XFe23+[Si2O6(OH)][SiO4](OH)2A |
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| Julgoldite-(Fe2+) | Ca2Fe2+Fe23+[Si2O6OH][SiO4](OH)2(OH) |
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| Julgoldite-(Fe3+) | Ca2Fe3+Fe23+[Si2O6OH][SiO4](OH)2O |
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| Julgoldite-(Mg) | Ca2MgFe23+[Si2O6OH][SiO4](OH)2(OH) |
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| Jungite | Ca2Zn4Fe83+(PO4)9(OH)9 · 16H2O |
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| Kaatialaite | Fe(H2AsO4)3 · 5H2O |
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| 'Kafehydrocyanite' | K4[Fe(CN)6] · H2O |
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| Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O |
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| Kalifersite | (K,Na)5Fe73+Si20O50(OH)6 · 12H2O |
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| 'Kaluginite' | (Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2O |
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| Kamarizaite | Fe33+(AsO4)2(OH)3 · 3H2O |
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| 'Kandite' | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
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| Kaňkite | FeAsO4 · 3.5H2O |
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| Kapundaite | NaCaFe4(PO4)4(OH)3 · 5H2O |
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| Karibibite | Fe33+(As3+O2)4(As23+O5)(OH) |
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| Karnasurtite-(Ce) | (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si2O7)(OH)4 · 3H2O |
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| 'Karphosiderite' | (H3O)Fe33+(SO4)2(OH)6 |
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| Kastningite | (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O |
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| Kazakhstanite | Fe53+V34+V125+O39(OH)9 · 9H2O |
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| Keckite | CaMn2+(Fe3+Mn2+)Fe23+(PO4)4(OH)3 · 7H2O |
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| Kenngottite | Mn32+Fe43+(PO4)4(OH)6(H2O)2 |
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| Kentbrooksite | (Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2O |
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| Kernowite | Cu2Fe(AsO4)(OH)4 · 4H2O |
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| Keystoneite | Mg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2O |
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| 'Khangalasite' | Fe(SO4)(OH) · 2H2O |
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| Khomyakovite | Na12Sr3Ca6Fe3Zr3W[Si25O73](O,OH,H2O)3(OH,Cl)2 |
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| Kidwellite | NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33 |
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| Kingsmountite | Ca3MnFeAl4(PO4)6(OH)4 · 12H2O |
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| Kinichilite | Mg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2O |
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| Kintoreite | PbFe3(PO4)(PO3OH)(OH)6 |
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| 'Kintoreite-2c' | PbFe33+(PO4)2(OH,H2O)6 |
|---|
| 'Kirovite' | (Fe,Mg)SO4 · 7H2O |
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