IMA Name Chemical Formula (Unformatted) Numbe R in Coll
Numbe r in IMA Name Chemical Formula (unformatted) Coll. Abernathyite K(UO2)(AsO4)•4(H2O) 1 Acanthite Ag2S >10 Acetamide CO(CH3)(NH2) 1 Actinolite Ca2(Mg,Fe++)5Si8O22(OH)2 >10 Adamite Zn2(AsO4)(OH) >2 Admontite MgB6O10•7(H2O) 1 Aegirine NaFe+++Si2O6 >10 Aenigmatite (Na,Ca)4(Fe++,Ti,Mg)12Si12O40 >2 (Ca,Na)6FeAl(Fe++,Mg)2(Al,Mg)6[Si12O36(OH)12H][(H2O)12(CO3 Aerinite )] 1 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 >2 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 >2 Afghanite (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3•(H2O) >2 Afwillite Ca3Si2O4(OH)6 >2 Agardite-(Nd) (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 1 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6•3(H2O) >2 Agrellite NaCa2Si4O10F 1 Aikinite PbCuBiS3 >2 Ajoite (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O) >2 Akaganeite Fe+++(O,OH,Cl) 1 Akatoreite (Mn++,Fe++)9Al2Si8O24(OH)8 1 Åkermanite Ca2MgSi2O7 1 Åkermanite-Gehlenite series member, undefined Ca2Mg(Si2O7)-Ca2Al(AlSiO7) >10 Akrochordite Mn4Mg(AsO4)2(OH)4•4(H2O) 1 Aktashite Cu6Hg3As4S12 1 Alabandite MnS >2 Alamosite PbSiO3 1 Albite NaAlSi3O8 >10 Albite, var. Andesine (Na,Ca)(Si,Al)4O8 >10 Albite, var. Oligoclase (Na,Ca)(Si,Al)4O8 >10 Alkali feldspar group, (var. anorthoclase) (Na,K)AlSi3O8 >10 Allactite Mn7(AsO4)2(OH)8 >2 Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe+++)3(SiO4)3(OH) >10 Allargentum Ag1-xSbx(x=0.009-0.16) 1 Alleghanyite Mn5(SiO4)2(OH)2 1 Allophane Al2O3•(SiO2)1.3-2•((H2O))2.5-3 >2 Alluaudite NaCaFe++(Mn,Fe++,Fe+++,Mg)2(PO4)3 >2 Almandine Fe++3Al2(SiO4)3 >10 Alstonite BaCa(CO3)2 >10 Altaite PbTe 1 Althausite Mg2(PO4)(OH,F,O) >2 Alum-(K) KAl(SO4)2•12(H2O) >2 Aluminite Al2(SO4)(OH)4•7(H2O)
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