The paulkerrite group includes:
hochleitnerite:
[K(H2O)]Mn2(Ti2Fe3+)(PO4)4O2(H2O)10.4H2O
hydroxylbenyacarite:
(H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10.4H2O
paulkerrite:
KMg2TiFe3+2(PO4)4(OH)3.15H2O
pleysteinite:
[(H2O)0.5K0.5]2Mn2Al3(PO4)4F2.4H2O
rewitzerite:
[K(H2O)]Mn2Al3(PO4)4(OH)2.14H2O
sperlingite:
(H2O)K(Mn2+Fe3+)(Al2Ti)(PO44[O(OH)][(H2O)9(OH)].4H2O
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