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Alunite supergroup

[D][G3][X6| T (O,OH)4| U (O,OH)4]
D: [ 4+: Th ][ 3+: Ce, La, Nd, Bi ][ 2+: Ca, Sr, Ba, Pb, Hg ][ 1+: Na, K, Rb, Ag, Tl, NH4, H3O ][ 0: [] ]
G: [ 4+: Sn ][ 3+: Al, Fe, V, Cr, Ga ][ 2+ Cu, Zn, Mg ]
T,U: [ 6+: S, Cr ][ 5+: P, As, Sb ][ 4+: Si ]
X: [ 2-: O ][ 1-: OH, F ][ 0: H2O ]