1. Synthesis of Ca2FeMnO5 was first reported in: Y. Nakahara, S. Kato, M. Sugai, Y. Ohshima, K. Makino, Mater. Lett. 30 (1997) 163.
2. Our preliminary results on cationic distribution and magnetic structure of Ca2FeMnO5 were reported previously in: (a) A.I. Rykov, K. Nomura, T. Mitsui, M. Seto, Physica B 350 (2004) 287; (b) Abstracts of II Conference of the Asian Consortium for Computational Materials Science “ACCNMS-2”, Responsible O.S. Subbotin, Novosibirsk, Nikolaev Institute of Inorganic Chemistry SB RAS, 2004, pp. 149–150.
3. For a recent review on Mn-based brownmillerites, see A.M. Abakumov, M.G. Rosova, E.V Antipov, Russ. Chem. Rev. 73 (2004) 847.
4. For structure of Sr2Mn2O5 see, e.g., the recent neutron-diffraction study by T. Mori, K. Inoue, N. Kamegashira, Y. Yamaguchi, K. Ohoyama, J. Alloys Compd. 296 (2000) 92.
5. Structure, magnetism and conductivity in BaMn3O6 were studied by K. Wakiya, H. Sato, A. Miyazaki, T. Enoki, M. Isobe, Y. Ueda, J. Alloys Compd. 317–318 (2001) 115.