C. Davisson and L. H. Germer, Diffraction of electrons by a crystal of nickel, Phys. Rev, vol.30, pp.705-740, 1927.

E. Wollan and C. Shull, The Diffraction of Neutrons by Crystalline Powders, Phys. Rev, vol.73, pp.830-841, 1948.

C. G. Shull, Early development of neutron scattering, Rev. Mod. Phys, vol.67, pp.753-757, 1995.

B. Raveau, C. Michel, and M. Hervieu, Layered Cuprates with Double and Triple Copper Layers -Structure and Superconductivity, J. Solid State Chem, vol.88, pp.140-162, 1990.

A. Maignan, C. Simon, V. Caignaert, and B. Raveau, Giant Magnetoresistance Ratios Superior to 10(11) in Manganese Perovskites, Solid State Commun, vol.96, pp.623-625, 1995.

Y. Klein, D. Pelloquin, S. Hebert, A. Maignan, J. Hejtmanek et al.,

C. Bi, CoO2](1.8) layer cobaltities: The role of the intergrowth between the n=3 and n=4 terms, J. Appl. Phys, vol.98, p.13701, 2005.

P. Granberg, P. Isberg, T. Baier, B. Hjorvarsson, and P. Nordblad, Anisotropic behaviour of the magnetoresistance in single crystalline iron films, J. Magn. Magn. Mater, vol.195, pp.1-8, 1999.

S. Marion, A. I. Becerro, and T. Norby, Ionic and Electronic Conductivity in CaTi

, Fe(x)O(3-delta) (x=0.1-0.3), Ionics, vol.5, pp.385-392, 1999.

J. Van-den-brink and D. I. Khomskii, Multiferroicity due to charge ordering, J. Phys.-Condens. Matter, vol.20, p.434217, 2008.

O. Evrard, Mise en évidence de CaFe4O6 et détermination des structures cristallines des ferrites de calcium CaFe2+nO4+n(n = 1, 2, 3): nouvel exemple d'intercroissance, J. Solid State Chem, vol.35, pp.112-119, 1980.

R. Gerardin, E. Millon, J. F. Brice, O. Evrard, and G. Le-caer, Transfert électronique d'intervalence entre sites inéquivalents: Étude de CaFe3O5 par spectrométrie Mössbauer

, J. Phys. Chem. Solids, vol.46, pp.1163-1171, 1985.

B. Malaman, Preparation et caracterisation des ferrites de calcium CaFe2+nO4+n a valeurs fractionnaires de n (3/2, 5/2) et leur incidence sur le diagramme Fe-Ca-O A 1120°C, Mater. Res. Bull, vol.16, pp.1139-1148, 1981.

A. Arakcheeva and O. Karpinskii, Crystal-Structure of Hexagonal Ferrite, Ca2,95Fe14, pp.85-110

, Dokl. Akad. Nauk Sssr, vol.273, pp.1127-1129, 1983.

C. Delacotte, Structural Transition at 360 K in the CaFe5O7 Ferrite: Toward a New Charge Ordering Distribution, Inorg. Chem, vol.53, pp.10171-10177, 2014.

A. H. Hill, Neutron Diffraction Study of Mesoporous and Bulk Hematite, ?-Fe2O3

, Chem. Mater, vol.20, pp.4891-4899, 2008.

J. P. Wright, A. M. Bell, and J. P. Attfield, Variable temperature powder neutron diffraction study of the Verwey transition in magnetite Fe3O4, Solid State Sci, vol.2, pp.747-753, 2000.

E. J. Verwey, Electronic Conduction of Magnetite (Fe3O4) and its Transition Point at Low Temperatures, Nature, vol.144, p.327, 1939.

J. P. Wright, J. P. Attfield, and P. G. Radaelli, Charge ordered structure of magnetite Fe3O4 below the Verwey transition, Phys. Rev. B, vol.66, p.214422, 2002.

X. Ming, Unusual intermediate spin Fe3+ ion in antiferromagnetic Li3FeN2

, Appl. Phys, vol.111, p.63704, 2012.

X. Feng, Slow Magnetic Relaxation in Intermediate Spin S=3/2 Mononuclear Fe(III) Complexes, J. Am. Chem. Soc, vol.139, pp.16474-16477, 2017.

C. Tassel, CaFeO2: A New Type of Layered Structure with Iron in a Distorted Square Planar Coordination, J. Am. Chem. Soc, vol.131, pp.221-229, 2009.

M. K. Gupta, Phonons and stability of infinite-layer iron oxides SrFeO2 and CaFeO2, Solid State Commun, vol.241, pp.43-55, 2016.

Y. Tsujimoto, Infinite-layer iron oxide with a square-planar coordination, Nature, vol.450, pp.1062-1070, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00803768

J. M. Pruneda, J. Iniguez, E. Canadell, H. Kageyama, and M. Takano, Structural and electronic properties of SrFeO2 from first principles, Phys. Rev. B, vol.78, p.115101, 2008.

G. Frisch and C. Rohr, New orthoferrates of rubidium and cesium: alpha-, betaCs5[(FeIIIO4) and A(7)(I)[(FeIVO4)(FeVO4) (A(I) = Rb, Cs), Z. Anorg. Allg. Chem, vol.631, pp.507-517, 2005.

N. Hollmann, Orbital occupation and magnetism of tetrahedrally coordinated iron in CaBaFe4O7, Phys. Rev. B, vol.83, p.180405, 2011.

B. C. Tofield, C. Greaves, and B. Fender, The SrFeO2.5 | SrFeO3.0 system, Evidence of a new phase Sr4Fe4O11 (SrFeO2.75), vol.10, pp.737-745, 1975.

M. Schmidt, M. Hofmann, and S. J. Campbell, Magnetic structure of strontium ferrite Sr4Fe4O11, J. Phys. Condens. Matter, vol.15, p.8691, 2003.

S. E. Dann, M. T. Weller, D. B. Currie, and . Structure,

, J. Solid State Chem, vol.97, pp.179-185, 1992.

J. Blasco, S. Lafuerza, J. Garcia, G. Subias, Y. ;-r-=-tm et al., Structural properties in RFe2O4 compounds, Phys. Rev. B, vol.90, p.94119, 2014.

H. Fjellvag, F. Gronvold, S. Stolen, and B. Hauback, On the crystallographic and magnetic structures of nearly stoichiometric iron monoxide, J. Solid State Chem, vol.124, pp.52-57, 1996.

E. Maslen, V. Streltsov, N. Streltsova, and . Ishizawa,

, Electron-Density in Alpha-Fe2O3, Acta Crystallogr. Sect. B-Struct. Sci, vol.50, pp.435-441, 1994.

F. Kanamaru, Synthesis of a New Perovskite CaFeO3, Mater. Res. Bull, vol.5, p.257, 1970.

P. M. Woodward, D. E. Cox, E. Moshopoulou, A. W. Sleight, and S. Morimoto, Structural studies of charge disproportionation and magnetic order in CaFeO3, Phys. Rev. B, vol.62, pp.844-855, 2000.

S. Hall and J. Stewart, Crystal-Structure Refinement of Chalcopyrite, CuFeS2. Acta Crystallogr. Sect. B-Struct. Sci. B, vol.29, pp.579-585, 1973.

J. Lemley, J. Jenks, J. Hoggins, Z. Eliezer, H. Steinfink et al.,

. Crystal-structures, M. Mossbauer, and E. Behavior, J. Solid State Chem, vol.16, pp.117-128, 1976.

H. King and C. Prewitt, High-Pressure and High-Temperature Polymorphism of Iron Sulfide (FeS), Acta Crystallogr. Sect. B-Struct. Sci, vol.38, pp.1877-1887, 1982.

H. Noel and J. Padiou, Crystal-Structure of FeUS3, Acta Crystallogr. Sect. B-Struct. Sci, vol.32, pp.1593-1595, 1976.

R. Shannon, Revised Effective Ionic-Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides, Acta Crystallogr. Sect. A, vol.32, pp.751-767, 1976.

M. Hillert, M. Selleby, and B. Sundman, An assessment of the Ca-Fe-O system

, Trans. A, vol.21, pp.2759-2776, 1990.

B. Malaman, H. Alebouyeh, A. Courtois, R. Gérardin, and O. Evrard, La structure cristalline de Ca4Fe9O17: Des feuillets "hexagonaux" d'octaèdres FeO6 et de bipyramides FeO5 liés par des tétraèdres FeO4, Mater. Res. Bull, vol.17, pp.795-800, 1982.

E. Millon, Structure cristalline du ferrite hemicalcique CaFe4O7, Mater. Res. Bull, vol.21, pp.985-994, 1986.

R. Gerardin, Structures et proprietes magnetiques des ferrites de calcium pseudo hexagonaux Ca4Fe9O17, CaFe4O7 et Ca3Fe15O25, J. Phys. Chem. Solids, vol.49, pp.343-348, 1988.

B. Bergman and C. Song, Microstructural Study of Phase Equilibria in the Fe-Ca-O System Involving CaFe5O7, J. Am. Ceram. Soc, vol.72, pp.1364-1367, 1989.

P. M. Woodward, D. E. Cox, E. Moshopoulou, A. W. Sleight, and S. Morimoto, Structural studies of charge disproportionation and magnetic order in CaFeO3, Phys. Rev. B, vol.62, pp.844-855, 2000.

T. Takeda, Metal-semiconductor transition, charge disproportionation, and lowtemperature structure of Ca1-xSrxFeO3 synthesized under high-oxygen pressure, Solid State Sci, vol.2, pp.673-687, 2000.

S. Nasu, Mossbauer Study of CaFeO3 Under External High-Pressure, Hyperfine Interact, vol.70, pp.1063-1066, 1992.

S. Morimoto, T. Yamanaka, and M. Tanaka, Structure and electron density distribution of CaFeO3 in the' "charge disproportionate"' state, Phys. B, vol.237, pp.66-67, 1997.

E. Bertaut, P. Blum, and A. Sagnieres, Structure Du Ferrite Bicalcique Et De La Brownmillerite, Acta Crystallogr, vol.12, pp.149-159, 1959.

J. Berggren, Refinement of Crystal-Structure of Dicalcium Ferrite, Ca2Fe2O5, Acta Chem. Scand, vol.25, p.3616, 1971.

P. Berastegui, S. G. Eriksson, and S. Hull, A neutron diffraction study of the temperature dependence of Ca2Fe2O5, Mater. Res. Bull, vol.34, pp.303-314, 1999.

J. E. Auckett, A. J. Studer, and C. D. Ling, Single-Crystal Neutron Diffraction Study of

, Superstructure Ordering and Domain Behaviour in Brownmillerite-Type Ca2Fe2O5, Aust. J. Chem, vol.67, pp.1824-1828, 2014.

T. Takeda, Magnetic Structure of Ca2Fe2O5, J. Phys. Soc. Jpn, vol.24, p.446, 1968.
DOI : 10.1143/jpsj.24.446

M. Eibschutz, U. Ganiel, and S. Shtrikman,

, Dicalcium Ferrite (Ca2Fe2O5), J. Mater. Sci, vol.4, p.574, 1969.

H. Krueger, V. Kahlenberg, V. Petricek, F. Phillipp, and W. Wertl, High-temperature structural phase transition in Ca2Fe2O5 studied by in-situ X-ray diffraction and transmission electron microscopy, J. Solid State Chem, vol.182, pp.1515-1523, 2009.

E. Asenath-smith, S. T. Misture, and D. D. Edwards, Structural behavior and thermoelectric properties of the brownmillerite system Ca2(ZnxFe2-x)O5, J. Solid State Chem, vol.184, pp.2167-2177, 2011.

E. Millon, O. Evrard, A. Bonazebi, J. Brice, and R. Gerardin, The Fe-Ca-O Diagram at 1200-Degrees-C -Study of the Fe3O4 -Fe2O3 -CaFe2O4 -CaFe3O5 Domain, Memoires Etudes Sci. Rev. Metall, vol.83, pp.583-593, 1986.

B. Decker and J. Kasper, The Structure of Calcium Ferrite, Acta Crystallogr, vol.10, pp.332-337, 1957.

E. Bertaut, J. Chappert, A. Apostolov, and V. Semenov, Etude Par Effet Mossbauer Et Par Diffraction Neutronique Du Ferrite Monocalcique Fe2O3, CaO. Bull. Soc. Francaise Mineral. Cristallogr, vol.89, p.206, 1966.

E. Tsipis, Oxygen ionic conductivity, Mössbauer spectra and thermal expansion of CaFe2O4-?. Solid State Ion, vol.178, pp.1428-1436, 2007.

L. S. Lobanovsky and S. V. Trukhanov, Magnetic properties of superstoichiometric

, CaFe2O4 + ? obtained by thermobaric synthesis, Crystallogr. Rep, vol.56, pp.482-485, 2011.

A. Samariya, Size dependent structural and magnetic behaviour of CaFe2O4

, Curr. Appl. Phys, vol.13, pp.830-835, 2013.

C. Delacotte, Coexistence at room temperature of two polymorphs in magnetic CaFe3O5 ferrite

C. Delacotte, Morin-like spin canting in the magnetic CaFe5O7 ferrite: A combined neutron and Mossbauer study, J. Solid State Chem, vol.247, pp.13-19, 2017.
URL : https://hal.archives-ouvertes.fr/hal-02161188

R. C. Pullar, Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics, Prog. Mater. Sci, vol.57, pp.1191-1334, 2012.

J. O. Edstrom, The phase CaO.2Fe2O3 in the system CaO-Fe2O3 and Its Importance as Binder in Ore Pellets, Jernkontorets Ann, vol.140, pp.101-116, 1956.

S. B. Holmquist, Two New Complex Calcium Ferrite Phases, Nature, vol.185, pp.604-604, 1960.

B. Phillips and A. Muan, Stability Relations of Calcium Ferrites -Phase Equilibria in the System 2CaO, Fe2O3-FeO.Fe2O3-Fe2O3 Above 1135-Degrees-C

. Eng, , vol.218, pp.1112-1118, 1960.

P. B. Braun-&-kwestroo and W. , On some calcium-iron-oxygen compounds, Philips Res Repts, vol.15, pp.394-397, 1960.

H. Chessin and E. T. Turkdogan, A crystallographic investigation of calcium diferrite, J. Am. Ceram. Soc, vol.45, pp.597-599, 1962.

N. Ichinose, Magnetic and Crystallographic Studies of Ferrimagnetic Calcium Ferrites Containing Tri-or Tetravalent Metal Ions, Jpn. J. Appl. Phys, vol.5, p.1140, 1966.

A. Arakcheeva and O. Karpinsky, Crystal-Structure of Ternary Hexagonal Ca-Ferrite Ca3.0Fe14.82O25 (gamma-Cff-Phase), Kristallografiya, vol.32, pp.59-61, 1987.

O. Karpinsky and A. Arakcheeva, Crystal-Structure of Ternary Hexagonal Ca-Ferrite Ca3.0Fe14.82O25 (alpha-Cff-Phase), Kristallografiya, vol.32, pp.55-58, 1987.

H. M. Rietveld, A profile refinement method for nuclear and magnetic structures

, Appl. Crystallogr, vol.2, pp.65-71, 1969.

D. B. Williams and C. B. Carter, Transmission Electron Microscopy: A Textbook for Materials Science, 2009.

R. Vincent and P. Midgley, Double Conical Beam-Rocking System for Measurement of Integrated Electron-Diffraction Intensities, Ultramicroscopy, vol.53, pp.271-282, 1994.

U. Kolb, T. Gorelik, C. Kuebel, M. T. Otten, and D. Hubert, Towards automated diffraction tomography: Part I -Data acquisition, Ultramicroscopy, vol.107, pp.507-513, 2007.

U. Kolb, T. Gorelik, and M. T. Otten, Towards automated diffraction tomography. Part II -Cell parameter determination, Ultramicroscopy, vol.108, pp.763-772, 2008.

L. Palatinus, PETS program for analysis of electron diffraction data, 2011.

V. Petricek, M. Dusek, and L. Palatinus, Crystallographic Computing System JANA2006: General features, Z. Krist.-Cryst. Mater, vol.229, pp.345-352, 2014.

L. Palatinus, The charge-flipping algorithm in crystallography, Acta Crystallogr. Sect

. B-struct, Sci, vol.69, pp.1-16, 2013.

G. Oszlanyi and A. Suto, Ab initio structure solution by charge flipping, Acta Crystallogr

, Sect. A, vol.60, pp.134-141, 2004.

G. Oszlanyi and A. Suto, The charge flipping algorithm, Acta Crystallogr. Sect. A, vol.64, pp.123-134, 2008.

L. Palatinus, Structure refinement from precession electron diffraction data

, Acta Crystallogr. Sect. A, vol.69, pp.171-188, 2013.

H. Bethe, Theory on the diffraction of electrons in crystals, Ann. Phys, vol.87, pp.55-129, 1928.

L. Palatinus, V. Petricek, and C. A. Correa, Structure refinement using precession electron diffraction tomography and dynamical diffraction: theory and implementation

, Acta Crystallogr. -Found. Adv, vol.71, pp.235-244, 2015.

L. Palatinus, Structure refinement using precession electron diffraction tomography and dynamical diffraction: tests on experimental data, Acta Crystallogr. Sect
URL : https://hal.archives-ouvertes.fr/hal-02112206

. B-struct, Sci. Cryst. Eng. Mater, vol.71, pp.740-751, 2015.

P. Stadelmann, JEMS -a Software Package for Electron-Diffraction Analysis and Hrem Image Simulation in Materials Science, Ultramicroscopy, vol.21, pp.131-145, 1987.

G. Bacon, Coherent Neutron-Scattering Amplitudes, Acta Crystallogr. Sect. -Cryst

, Phys. Diffr. Theor. Gen. Crystallogr. A, vol.28, p.357, 1972.

J. Kanamori, Superexchange Interaction and Symmetry Properties of Electron Orbitals, J. Phys. Chem. Solids, vol.10, pp.87-98, 1959.

, Quantum Design -Physical Property Measurement System -Thermal Transport Option User's Manual, 2002.

H. Oneill, Temperature-Dependence of the Cation Distribution in Zinc Ferrite (ZnFe2O4) from Powder Xrd Structural Refinements, Eur. J. Mineral, vol.4, pp.571-580, 1992.

A. Pavese, D. Levy, and A. Hoser, Cation distribution in synthetic zinc ferrite (Zn0.97Fe2.02O4) from in situ high-temperature neutron powder diffraction, Am. Mineral, vol.85, pp.1497-1502, 2000.

W. Schafer, Structural and magnetic variations of ZnFe2O4 spinels-neutron powder diffraction studies, European Powder Diffraction, Pts, vol.1, issue.2, pp.321-324, 2000.

M. Fleet, The Structure of Magnetite -Defect Structure Ii, Acta Crystallogr. Sect. BStruct. Sci, vol.38, pp.1718-1723, 1982.

M. Fleet, The Structure of Magnetite -2 Annealed Natural Magnetites, Fe3.005O4 and Fe2.96Mg0.04O4, Acta Crystallogr. Sect. C-Cryst. Struct. Commun, vol.40, pp.1491-1493, 1984.

E. Sokolova, D. Pushcharovskii, and B. Chesnokov, Crystalline-Structure of Technogen Magnesioferrite, Kristallografiya, vol.38, pp.233-235, 1993.

A. M. Balagurov, I. A. Bobrikov, M. S. Maschenko, D. Sangaa, and V. G. Simkin,

, Structural phase transition in CuFe2O4 spinel, Crystallogr. Rep, vol.58, pp.710-717, 2013.

C. Hejny and T. Armbruster, Polysomatism in hogbomite: The crystal structures of 10T, 12H, 14T, and 24R polysomes, Am. Mineral, vol.87, pp.592-592, 2002.