Complete mineralogical data for ALLACTITE. Chemical Formula: Mn2+7(AsO4)2(OH)8. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for ALLANITE-(Ce). Chemical Formula: CaCeFe2+Al2[Si2O7][SiO4]O(OH). Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for ÅKERMANITE. Chemical Formula: Ca2Mg[Si2O7]. Crystal System: Tetragonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKHTENSKITE. Chemical Formula: MnO2. Crystal System: Hexagonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKIMOTOITE. Chemical Formula: Mg[SiO3]. Crystal System: Hexagonal-Trigonal. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKLIMAITE. Chemical Formula: Ca4[Si2O5(OH)2](OH)4·5H2O. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKOPOVAITE. Chemical Formula: Li2Al4(OH)12(CO3)·3H2O. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKROCHORDITE. Chemical Formula: Mn2+Mn2+2Mn2+2(AsO4)2(OH)4(H2O)4. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKSAITE. Chemical Formula: Mg[B6O7(OH)6]·2H2O. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for AKTASHITE. Chemical Formula: Cu6Hg3As4S12. Crystal System: Hexagonal-Trigonal. Learn about its geologic occurrence, habit, and identification.