Three novel isotypic borophosphates M-II[BPO4(OH)(2)] (M-II = Mn, Fe, Co) have been hydrothermally synthesized and structurally characterized. The isotypic compounds crystallize in the chiral space group P3(1)21 or P3(2)21. Their crystal structures are characterized by edge-sharing helical (MO6)-O-II-octahedral chains wound around 31 or 32 screw axes ( along [ 001]) interconnected by borophosphate single chains of alternating BO2(OH)(2) and PO4 tetrahedra perpendicular to [001], resulting in three-dimensional framework structures. The helical (MO6)-O-II-octahedral chains lead to low-dimensional magnetic properties.