Synthesis, crystal structures and ionic conductivites of Bi14P4O31 and Bi50V4O85. Two members of the series Bi18-4mM4mO27+4m (M = P, V) related to the fluorite-type structure
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MAUVY, Fabrice | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LAUNAY, Jean-Claude | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DARRIET, Jacques | |
| dc.date.issued | 2005 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | The two hitherto unknown compounds Bi14P4O31 and Bi50V4O85 were prepared by the direct solid-state reaction of Bi2O3 and (NH4)H2PO4 or V2O5, respectively. Bi14P4O31 crystallizes in a C-centred monoclinic symmetry (C2/c space group) with the unit-cell parameters: a = 19.2745(2) A, b = 11.3698(1) A, c = 52.4082(2) A and β=93.63(1)° (Z=16). The symmetry of Bi50V4O85 is also monoclinic (I2/m space group) with lattice parameters of a = 11.8123(3) A, b = 11.7425(2) A, c = 16.5396(2) A and β=90.14(1)° (Z=2). Both structures correspond to a fluorite-type superstructure where the Bi and P or V atoms are ordered in the framework. An idealized structural model is proposed where the structures result of the stacking of mixed atomic layers of composition [Bi14M4O31] and [Bi18O27] respectively. This new family can be formulated Bi18−4mM4mO27+4m with M=P, V and where the parameter m (0less-than-or-equals, slantmless-than-or-equals, slant1) represents the ratio of the number of [Bi14M4O31] layers to the total number of layers in the sequence. Bi14P4O31 corresponds to m=1 when Bi50V8O85 corresponds to m=1/3. In this last case, the structural sequence is simply one [Bi14V4O31] layer to two [Bi18O27] layers. As predicted by the proposed structural building principle, Bi14P4O31 is not a good ionic conductor. The conductivity at 650 °C is 4 orders of magnitude lower from those found in Bi46M8O89 (M=P, V) (m=2/3) and Bi50V4O85 (m=1/3). | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Phosphorous | |
| dc.subject.en | Vanadium | |
| dc.subject.en | Bismuth | |
| dc.subject.en | Oxides | |
| dc.subject.en | Crystal Structures | |
| dc.subject.en | Fluorite-type superstructure | |
| dc.subject.en | Ionic conductivity | |
| dc.title.en | Synthesis, crystal structures and ionic conductivites of Bi14P4O31 and Bi50V4O85. Two members of the series Bi18-4mM4mO27+4m (M = P, V) related to the fluorite-type structure | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2005.03.048 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | p. 2015-2023 | |
| bordeaux.volume | vol. 178, n° 6 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00022836 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00022836v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Solid%20State%20Chemistry&rft.date=2005&rft.volume=vol.%20178,%20n%C2%B0%206&rft.spage=p.%202015-2023&rft.epage=p.%202015-2023&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=MAUVY,%20Fabrice&LAUNAY,%20Jean-Claude&DARRIET,%20Jacques&rft.genre=article |
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