IP lattice parameters

Chu, Y.-H, Q Zhan, L.W Martin, M.P Cruz, P.-L Yang, G.W Pabst, F Zavaliche, S.-Y Yang, J.-X Zhang, L.-Q Chen, D.G Schlom, I.-N Lin, T.-B Wu, and Ramamoorthy Ramesh. "Nanoscale domain control in multiferroic BiFeO3 thin films." Advanced Materials 18 (2006) 2307–2311.