. Cartes-de-symétrie, -y,-1/2+z ; (x) 1/2+x,-3/2- y,3/2+z ; (xi) 1/2+x,-1/2-y,-1/2+z ; (xii) -x,1-y,1-z (xiii) 1/2+x, xiv) 1-x,-y,2-z Bi1-O1 i 2.325(19) Bi2-O1 v 2.395(19) Pb1-O1 v 2.336(19) Bi1-O1 ii 2.325(19) Bi2-O1 vi 2.395(19) Pb1-O1 vi 2) Pb1-O23 ix 2.91(4) Bi1-O14 viii 2.75(4) Bi2-O24 xi 2.97(5) Pb1-O24 2.50(5) Pb1-O24 ix 2.50(5) Pb2-O1 i 2.226(19) Pb3-O2 2.299(19)) Pb3-O12 xiv 2.45(4) Pb4-O12 xix 2.54(4) Pb2-O22 vii 2.82(7) Pb3-O12 xv 2.45(4) Pb4-O13 v 2.83(5) Pb2-O22 viii 2.82(7) Pb3-O13, pp.4-24

. Cartes-de-symétrie, 1-z ; (iv) -1+x,1/2-y,1+z ; (v) -x,1-y,1-z ; (vi) x,-1/2-y,1+z ; (vii) -x,-y,1-z ; (viii) x,1/2-y,1+z ; (ix) x,1/2-y,z ; (x) 1-x,-y,-z (xi) 1+x,1/2-y,z ; (xii) -2-x,-y,-z ; (xiii) -2+x,1/2-y,z ; (xiv) 1-x,-y,2-z ; (xv) 1+x,1/2-y,2+z ; (xvi) 1-x,1-y,2-z ; (xvii) 1+x,-1/2- y,2+z ; (xviii) -1-x,-y,-1-z ; (xix) -1+x1+z ; (xx) -1-x,1-y,1-z ; (xxi) -1+x, pp.61-63

F. Abraham, O. Cousin, O. Mentre, and M. Ketatni-el, Crystal Structure Approach of the Disordered New Compounds Bi???1.2M???1.2PO5.5 (M=Mn, Co, Zn): The Role of Oxygen-Centered Tetrahedra Linkage in the Structure of Bismuth???Transition Metal Oxy-phosphates, Journal of Solid State Chemistry, vol.167, issue.1, p.168, 2002.
DOI : 10.1006/jssc.2002.9639

A. L. Allred, E. G. Rochow, and J. Inorg, A scale of electronegativity based on electrostatic force, Journal of Inorganic and Nuclear Chemistry, vol.5, issue.4, p.264, 1958.
DOI : 10.1016/0022-1902(58)80003-2

M. Camalli, SIR 97, J. Appl. Crystallogr, vol.27, p.434, 1994.

A. M. Azad, S. Larose, and S. A. Akbar, Bismuth oxide-based solid electrolytes for fuel cells, Journal of Materials Science, vol.53, issue.56, p.4135, 1994.
DOI : 10.1007/BF00414192

R. Bliesner, S. Uma, A. Yokochi, and A. W. Sleight, and Implications for Ionic Conductivity, Chemistry of Materials, vol.13, issue.11, p.3825, 2001.
DOI : 10.1021/cm010522t

R. Bliesner, S. Uma, A. Yokochi, and A. W. Sleight, and Implications for Ionic Conductivity'???, Chemistry of Materials, vol.14, issue.3, p.1440, 2002.
DOI : 10.1021/cm022001r

S. K. Blower and C. Greaves, The structure of ??-Bi2O3 from powder neutron diffraction data, Acta Crystallographica Section C Crystal Structure Communications, vol.44, issue.4, p.587, 1988.
DOI : 10.1107/S0108270187011661

F. Bosselet, B. F. Mentzen, and J. Et-bouix, Etude de la solution solide Pb2O(S1???xWxO4) et structure cristalline de la variete alpha du monooxodiplomb (II) tetraoxotungstate (VI) Pb2O(WO4) par diffraction X sur poudres, Materials Research Bulletin, vol.20, issue.11, p.1329, 1985.
DOI : 10.1016/0025-5408(85)90126-6

B. Boucher, R. Buhl, and M. Perrin, Proprietes et structure magnetique de Mn3O4, Journal of Physics and Chemistry of Solids, vol.32, issue.10, p.2429, 1971.
DOI : 10.1016/S0022-3697(71)80239-1

L. H. Brixner and C. M. Foris, BiPbVO5 ??? A new bismuth lead vanadate, Materials Research Bulletin, vol.9, issue.3, p.273, 1974.
DOI : 10.1016/0025-5408(74)90076-2

L. H. Brixner, R. B. Flippen, and W. Jeitschko, Preparation and properties of the Pb3(VO4)2Pb3(PO4)2 system, Materials Research Bulletin, vol.10, issue.12, p.1327, 1975.
DOI : 10.1016/0025-5408(75)90093-8

. Bruker, Apex-II Version 1.0-27, Bruker AXS Inc

M. Colmont, M. Huvé, E. M. Ketatni, F. Abraham, and O. Mentré, Double (n=2) and triple (n=3) [M4Bi2n???2O2n]x+ polycationic ribbons in the new Bi???3Cd???3.72M???1.28O5(PO4)3 oxyphosphate (M=Co, Cu, Zn), Journal of Solid State Chemistry, vol.176, issue.1, p.221, 2003.
DOI : 10.1016/S0022-4596(03)00413-4
URL : https://hal.archives-ouvertes.fr/hal-00130185

N. Cornei, N. Tancret, F. Abraham, and O. Mentré, Metastable Polymorph, Inorganic Chemistry, vol.45, issue.13, p.4886, 2006.
DOI : 10.1021/ic0605221
URL : https://hal.archives-ouvertes.fr/hal-00105063

O. Cousin, M. Huvé, P. Roussel, O. Perez, and H. Steinfink, The Crystal Structure of Bi2PbMnO4(PO4)2, a Member of a New Solid Solution Series in the Bi???Pb???Mn???P Oxide System, Journal of Solid State Chemistry, vol.165, issue.2, p.324, 2002.
DOI : 10.1006/jssc.2002.9544

L. E. Depero and L. Sangaletti, Structural Disorder and Ionic Conduction: The Case of Bi2O3, Journal of Solid State Chemistry, vol.122, issue.2, p.439, 1996.
DOI : 10.1006/jssc.1996.0139

M. Drache, S. Obbade, J. P. Wignacourt, and P. Conflant, Structural and Conductivity Properties of Bi0.775Ln0.225O1.5Oxide Conductors (Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy) with Rhombohedral Bi???Sr???O Type, Journal of Solid State Chemistry, vol.142, issue.2, p.349, 1999.
DOI : 10.1006/jssc.1998.8043

I. R. Evans, J. S. Evans, and J. A. Howard, Variable temperature structural study of bismuth lead vanadate, BiPb2VO6, Journal of Materials Chemistry, vol.12, issue.9, p.2648, 2002.
DOI : 10.1039/b202648a

G. Gattow and H. Schroder, ???ber Wismutoxide. III. Die Kristallstruktur der Hochtemperaturmodifikation von Wismut(III)-oxid (?-Bi2O3), Zeitschrift f???r anorganische und allgemeine Chemie, vol.40, issue.3-4, p.176, 1962.
DOI : 10.1002/zaac.19623180307

G. Gattow and D. Schuetze, ???ber Wismutoxide. VI. ???berein Wismut (III)-oxid mit h???herem Sauerstoffgehalt (?-Modifikation), Zeitschrift f???r anorganische und allgemeine Chemie, vol.28, issue.1-2, p.44, 1964.
DOI : 10.1002/zaac.19643280106

S. Giraud, J. P. Wignacourt, S. Swinnea, M. Drache, H. Steinfink et al., Crystal Structure of Pb5Bi18P4O42: A Fluorite-Related Superstructure, Journal of Solid State Chemistry, vol.151, issue.2, p.181, 2000.
DOI : 10.1006/jssc.2000.8633

S. Giraud, A. Mizrahi, M. Drache, P. Conflant, J. P. Wignacourt et al., A new family of compounds with tetrahedral anions: PbnBiOn(XO4), X = V, P, As, n = 1, 2, 4. A comparison with lead oxysulfates PbnPbOn(SO4), Solid State Sciences, vol.3, issue.5, p.593, 2001.
DOI : 10.1016/S1293-2558(01)01166-9

S. Giraud, S. Obbade, E. Suard, H. Steinfink, and J. P. Wignacourt, Structures and ionic conductivities in two fluorite type families: Pb5Bi17X5O43 and Pb5Bi18X4O42 (X=P, V and As), Solid State Sciences, vol.5, issue.2, p.335, 2003.
DOI : 10.1016/S1293-2558(02)00018-3
URL : https://hal.archives-ouvertes.fr/hal-00726484

H. A. Harwig and A. G. Gerards, Electrical properties of the ??, ??, ??, and ?? phases of bismuth sesquioxide, Journal of Solid State Chemistry, vol.26, issue.3, p.265, 1978.
DOI : 10.1016/0022-4596(78)90161-5

J. Huang, Q. Gu, and A. W. Sleight, Synthesis and Characterization of Bismuth Magnesium Phosphate and Arsenate: BiMg2PO6 and BiMg2AsO6, Journal of Solid State Chemistry, vol.105, issue.2, p.599, 1993.
DOI : 10.1006/jssc.1993.1254

Y. C. Jie and W. Eysel, New phases and solid solutions in the systems PbO???Bi2O3???P2O5/As2O5/V2O5, Powder Diffraction, vol.88, issue.02, p.76, 1995.
DOI : 10.1107/S0365110X48000478

H. Kasatani, T. Umeki, H. Terauchi, Y. Ishibashi, and J. , Crystal, Journal of the Physical Society of Japan, vol.60, issue.4, p.1169, 1991.
DOI : 10.1143/JPSJ.60.1169

M. Ketatni, F. Abraham, and O. Mentre, Channel structure in the new BiCoPO5. Comparison with BiNiPO5. Crystal structure, lone pair localisation and infrared characterisation, Solid State Sciences, vol.1, issue.6, p.449, 1999.
DOI : 10.1016/S1293-2558(00)80097-7

M. Ketatni, B. Mernari, F. Abraham, and O. Mentre, Crystal Structure of BiZn2PO6. Filiation between Related Compounds, Journal of Solid State Chemistry, vol.153, issue.1, p.48, 2000.
DOI : 10.1006/jssc.2000.8738

C. S. Lee, C. K. Lee, D. C. Sinclair, Z. Zainal, and M. Hashim, Solid State Ionics : Trends in the new millenium, p.553, 2002.

C. K. Lee, C. S. Lee, A. Watanabe, and D. C. Sinclair, Synthesis and ionic conductivity of PbBi6M2O15 (M=V, P, As) and SrBi6V2O15 solid solutions, Solid State Ionics, vol.171, issue.3-4, p.237, 2004.
DOI : 10.1016/j.ssi.2004.03.011

G. Malmros, The Crystal Structure of alpha-Bi2O2., Acta Chemica Scandinavica, vol.24, p.384, 1970.
DOI : 10.3891/acta.chem.scand.24-0384

F. Mauvy, J. C. Launay, and J. Darriet, Synthesis, crystal structures and ionic conductivities of Bi14P4O31 and Bi50V4O85. Two members of the series Bi18???4mM4mO27+4m (M=P, V) related to the fluorite-type structure, Journal of Solid State Chemistry, vol.178, issue.6, p.2015, 2005.
DOI : 10.1016/j.jssc.2005.03.048

B. F. Mentzen and A. Latrach, The crystal structures of PbO.PbXO4 (X = S, Cr, Mo) at 5K by neutron powder profile refinement, Materials Research Bulletin, vol.19, issue.5, p.549, 1984.
DOI : 10.1016/0025-5408(84)90121-1

A. Mizrahi, J. P. Wignacourt, and H. Steinfink, Pb2BiO2PO4, a New Oxyphosphate, Journal of Solid State Chemistry, vol.133, issue.2, p.516, 1997.
DOI : 10.1006/jssc.1997.7520

E. P. Moore, H. Y. Chen, L. H. Brixner, and C. M. Foris, The crystal structure of Pb8Bi2(PO4)6O2, Materials Research Bulletin, vol.17, issue.5, p.653, 1982.
DOI : 10.1016/0025-5408(82)90049-6

E. Morin, G. Wallez, S. Jaulmes, J. C. Couturier, and M. Quarton, Structure of PbIISnIV(PO4)2: Stereochemical Activity of the Lead II Lone Pair, Journal of Solid State Chemistry, vol.137, issue.2, p.283, 1998.
DOI : 10.1006/jssc.1997.7735

J. P. Mornirolli and J. W. Steeds, Microdiffraction as a tool for crystal structure identification and determination, Ultramicroscopy, vol.45, issue.2, p.219, 1992.
DOI : 10.1016/0304-3991(92)90511-H

S. Nadir, J. S. Swinnea, and H. Steinfink, Crystal Structure and Physical Properties of BiCoPO5, Journal of Solid State Chemistry, vol.148, issue.2, p.295, 1999.
DOI : 10.1006/jssc.1999.8450

L. Pauling, The Nature of the Chemical Bond. V, The Journal of Chemical Physics, vol.2, issue.8, 1939.
DOI : 10.1063/1.1749514

J. M. Perez-mato, M. Zakhour-nakhl, F. Weill, and J. Darriet, Structure of composites A1+x(A???xB1???x)O3 related to the 2H hexagonal perovskite: relation between composition and modulation, Journal of Materials Chemistry, vol.9, issue.11, p.2795, 1999.
DOI : 10.1039/a903723c

N. Portefaix, P. Conflant, J. Boivin, J. Wignacourt, and M. Drache, New Bi???Ln???V???O Anionic Conductors with??-Bi2O3Fluorite-Type Structure (Ln=Y, Sm, Eu, Gd, Tb, Dy, Er, Yb), Journal of Solid State Chemistry, vol.134, issue.2, p.219, 1997.
DOI : 10.1006/jssc.1997.7483

I. Radosavljevic, J. S. Evans, and A. W. Sleight, Synthesis and Structure of BiCa2VO6, Journal of Solid State Chemistry, vol.137, issue.1, p.143, 1998.
DOI : 10.1006/jssc.1997.7741

I. Radosavljevic, J. S. Evans, and A. W. Sleight, Synthesis and Structure of Bismuth Copper Vanadate, BiCu2VO6, Journal of Solid State Chemistry, vol.141, issue.1, p.149, 1998.
DOI : 10.1006/jssc.1998.7931

I. Radosavljevic and A. W. Sleight, Variable Temperature X-Ray Diffraction Study of Bismuth Magnesium Vanadate, BiMg2VO6, Journal of Solid State Chemistry, vol.149, issue.1, p.143, 2000.
DOI : 10.1006/jssc.1999.8512

I. Radosavljevic, J. A. Howard, and A. W. Sleight, Synthesis and structure of two new bismuth cadmium vanadates, BiCdVO5 and BiCd2VO6, and structures of BiCa2AsO6 and BiMg2PO6, International Journal of Inorganic Materials, vol.2, issue.6, pp.543-151, 1967.
DOI : 10.1016/S1466-6049(00)00080-5

H. M. Rietveld, A profile refinement method for nuclear and magnetic structures, Journal of Applied Crystallography, vol.2, issue.2, p.65, 1969.
DOI : 10.1107/S0021889869006558

P. Roussel, S. Giraud, E. Suard, J. P. Wignacourt, and H. Steinfink, A new fluorite type compound Pb5Bi17X5O43: synchrotron and neutron structure determination (X=P) and conduction properties (X=P, V and As), Solid State Sciences, vol.4, issue.9, p.1143, 2002.
DOI : 10.1016/S1293-2558(02)01380-8
URL : https://hal.archives-ouvertes.fr/hal-00726567

N. M. Sammes, G. A. Tompsett, H. Nafe, F. Aldinger, J. Eur-schönleber et al., Bismuth based oxide electrolytes??? structure and ionic conductivity, Journal of the European Ceramic Society, vol.19, issue.10, pp.1801-777, 1999.
DOI : 10.1016/S0955-2219(99)00009-6

R. D. Shannon, Dielectric polarizabilities of ions in oxides and fluorides, Journal of Applied Physics, vol.73, issue.1, p.348, 1993.
DOI : 10.1063/1.353856

D. C. Sinclair, E. Marinou, and J. M. Skakle, The crystal structure of a new oxide ion conductor NaBi3V2O10 and oxide ion conductivity in Pb2Bi2V2O10, Journal of Materials Chemistry, vol.9, issue.10, p.2617, 1999.
DOI : 10.1039/a904273c

J. L. Soubeyroux, M. Devalette, N. Khachani, P. Hagenmuller, A. L. Spek et al., Etude par diffraction neutronique de la phase Bi12[Bi+V0,75V+V0,05???0,20]O20 de structure sillenite, Journal of Solid State Chemistry, vol.86, issue.1, pp.59-93, 1990.
DOI : 10.1016/0022-4596(90)90113-C

A. Teichert and H. Mueller-buschbaum, Ein neuer Strukturtyp zur Formel A2MO4: Pb2MnO4, eine Tunnelstruktur mit einseitig koordinierten Pb2+-Ionen, Zeitschrift f???r anorganische und allgemeine Chemie, vol.6, issue.1, p.319, 1991.
DOI : 10.1002/zaac.19915980129

O. Thery, R. N. Vannier, C. Dion, and A. Abraham, Preparation, characterization and oxide ion conductivity in U-substituted Bi4V2O11, Solid State Ionics, vol.90, issue.1-4, p.105, 1996.
DOI : 10.1016/S0167-2738(96)00359-1

R. N. Vannier, G. Mairesse, A. Abraham, and G. Nowogrocki, Incommensurate Superlattice in Mo-Substituted Bi4V2O11, Journal of Solid State Chemistry, vol.103, issue.2, p.441, 1993.
DOI : 10.1006/jssc.1993.1120

A. Verbaere, R. Marchand, and M. Tournoux, Localisation du doublet solitaire dans les compos??s oxyg??n??s cristallis??s du thallium I, Journal of Solid State Chemistry, vol.23, issue.3-4, p.383, 1978.
DOI : 10.1016/0022-4596(78)90088-9

V. Engel and G. , Verbindungen des Typs MII3MIII(PO4)3 mit Eulytinstruktur (MII = Pb, Sr, Ba; MIII = La, Lanthanide, Y, Sc, Bi, In, TI)1, Zeitschrift f???r anorganische und allgemeine Chemie, vol.2, issue.1, p.22, 1972.
DOI : 10.1002/zaac.19723870104

A. Watanabe, Solid State Ionics, p.75, 1997.

A. Watanabe and Y. Kitami, Solid State Ionics, pp.113-115, 1998.

A. Watanabe, Preparation and Characterization of a New Triclinic Compound Bi3.5V1.2O8.25 to Show the Known Phase Bi4V2O11 to Be Nonexistent as a Single Phase, Journal of Solid State Chemistry, vol.161, issue.2, p.410, 2001.
DOI : 10.1006/jssc.2001.9356

R. L. Withers, S. Schmid, and J. G. Thompson, Compositionally and/or displacively flexible systems and their underlying crystal chemistry, Progress in Solid State Chemistry, vol.26, issue.1, p.1, 1998.
DOI : 10.1016/S0079-6786(97)82935-4

X. Xun, S. Uma, and A. W. Sleight, Synthesis and structure of BiMnPO5, Journal of Alloys and Compounds, vol.338, issue.1-2, p.51, 2002.
DOI : 10.1016/S0925-8388(02)00213-X

X. Xun, A. Yokochi, and A. W. Sleight, Synthesis and Structure of BiMnVO5 and BiMnAsO5, Journal of Solid State Chemistry, vol.168, issue.1, p.224, 2002.
DOI : 10.1006/jssc.2002.9714

X. Xun, S. Uma, S. Yokochi, and A. W. Sleight, Synthesis and Structure of New BiMn2MO6 Compounds Where M=P, As, or V, Journal of Solid State Chemistry, vol.167, issue.1, p.245, 2002.
DOI : 10.1006/jssc.2002.9654