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Structural study and physical properties of a new phosphate KCuFe(PO<sub>4</sub>)<sub>2</sub>
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | BADRI, Abdessalem | |
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | HIDOURI, Mourad | |
| hal.structure.identifier | Departamento de Química Inorgánica I | |
| dc.contributor.author | LOPEZ, Maria Luisa | |
| hal.structure.identifier | Departamento de Química Inorgánica I | |
| dc.contributor.author | PICO, Carlos | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WATTIAUX, Alain | |
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | BEN AMARA, Mongi | |
| dc.date.issued | 2011 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | Single crystals of a new phosphate KCuFe(PO<sub>4</sub>)<sub>2</sub> have been prepared by the flux method and its structural and physical properties have been investigated. This compound crystallizes in the monoclinic system with the space group <i>P</i>2<sub>1</sub>/<i>n</i> and its parameters are: <i>a</i>=7.958(3) Å, <i>b</i>=9.931(2) Å, <i>c</i>=9.039(2) Å, <i>β</i>=115.59(3)° and <i>Z</i>=4. Its structure consists of FeO<sub>6</sub> octahedra sharing corners with Cu<sub>2</sub>O<sub>8</sub> units of edge-sharing CuO<sub>5</sub> polyhedra to form undulating chains extending infinitely along the <i>b</i>-axis. These chains are connected by the phosphate tetrahedra giving rise to a 3D framework with six-sided tunnels parallel to the [101] direction, where the K<sup>+</sup> ions are located. The Mössbauer spectroscopy results confirm the exclusive presence of octahedral Fe<sup>3+</sup> ions. The magnetic measurements show the compound to be antiferromagnetic with <i>C</i><sub><i>m</i></sub>=5.71 emu K/mol and <i>θ</i>=−156.5 K. The derived experimental effective moment <i>μ</i><sub><i>ex</i></sub>=6.76<i>μ</i><sub>B</sub> is somewhat higher than the theoretical one of <i>μ</i><sub><i>th</i></sub>=6.16<i>μ</i><sub>B</sub>, calculated taking only into account the spin contribution for Fe<sup>3+</sup> and Cu<sup>2+</sup> cations. Electrical measurements allow us to obtain the activation energy (1.22 eV) and the conductivity measurements suggest that the charge carriers through the structure are the potassium cations. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Phosphate | |
| dc.subject.en | X-ray diffraction | |
| dc.subject.en | Mössbauer spectroscopy | |
| dc.subject.en | Magnetic susceptibility | |
| dc.subject.en | Electrical measurements | |
| dc.title.en | Structural study and physical properties of a new phosphate KCuFe(PO<sub>4</sub>)<sub>2</sub> | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2011.02.021 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | 937-944 | |
| bordeaux.volume | 184 | |
| bordeaux.issue | 4 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00586369 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00586369v1 | |
| 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=2011&rft.volume=184&rft.issue=4&rft.spage=937-944&rft.epage=937-944&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=BADRI,%20Abdessalem&HIDOURI,%20Mourad&LOPEZ,%20Maria%20Luisa&PICO,%20Carlos&WATTIAUX,%20Alain&rft.genre=article |
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