Five different lanthanum phosphonate MOFs were developed by changing the anion within the cationically charged structure. An in depth look at the grain boundary was undertaken by sieving various particle sizes of PCMOF21-AcO and comparing particle sizes with different amounts of surface area and measuring resistance to determine the contribution of the grain boundary to the overall resistance of the material. PCMOF21-Br and PCMOF21-Cl were compared for the effects that the anion had on the composition of the framework and if the anions had any effect on the overall conduction of the material. Two different phases of this material were developed showing a clear trend that the bromide containing frameworks conduct more efficiently than the chloride containing frameworks. The limitations of current analytical tools in the field of MOFs was also studied at length.