Organically Templated Linear and Layered Iron Sulfates

Linear and layered organically templated iron sulfates have been prepared under hydrothermal conditions. The linear iron sulfates, with the compositions [H 3 N(CH 2 ) 2 NH 3 ][FeF 3 (SO 4 )], I, [C(NH 2 ) 3 ] 2 [FeF(SO 4 ) 2 ], II, [H 3 N(CH 2 ) 2 NH 2 (CH 2 ) 2 NH 3 ][FeF(SO 4 ) 2 ], III, and [H 2 N(CH 2 ) 4 NH 2 ][FeF 3 SO 4 ], IV, possess the chain topologies found in tancoite, butlerite, and sideronatrite minerals. The layered sulfate V, with the composition [H 3 N(CH 2 ) 2 NH 3 ][Fe 2 F 2 (SO 4 ) 2 (H 2 O) 2 ], can be considered to be formed from butlerite-type chains and with a structure similar to that of the layered fluorophosphate, ULM-10. Whereas the linear chains show the presence of antiferromagnetic interactions, the layered iron sulfate exhibits metamagnetism.