The structure of a cubic hydrogen rhenium bronze, H1.36ReO3

Dickens, Peter; Weller, Mark T.

doi:10.1016/0022-4596(83)90099-3

Cited by 33 publications

(16 citation statements)

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“…To conclude, the results obtained from the analysis of the Re L 1 and L 3 edges EXAFS and XANES signals show an evidence of the charge disproportionation phenomenon [19,20] [9]). …”

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confidence: 86%

“…While many perovskites, as for example SrTiO 3 , BaTiO 3 and KNbO 3 , show upon temperature change a series of phase transitions, caused by condensation of one or more optical modes [4] and accompanied by the electronic and atomic structure changes, the structure of ReO 3 remains non-distorted at atmospheric pressure down to liquid-helium temperature [3]. However, a number of phase transitions can be induced in ReO 3 by applying external pressure [1,5,6] or by hydrogen insertion, that results in the formation of hydrogen rhenium bronzes H x ReO 3 [7][8][9].X-ray and neutron diffraction [1,5,6] and X-ray absorption spectroscopy (XAS) [10] studies has revealed that pressure effect results in a rotation (the Re-O-Re angle changes from 180° to 160°) of ReO 6 octahedra, but the octahedra remain regular with the Re-O bond length about 1.88±0.01 Å. Neutron diffraction study [9] of the hydrogen rhenium bronze D 1.36 ReO 3 showed that the hydrogen insertion produces similar effect on the ReO 3 structure. In particular, for x=1.36 the bronze structure is composed of tilted regular ReO 6 octahedra with the Re-O-Re angle equal to 169° and the Re-O distance of about 1.90 Å [9].…”

mentioning

confidence: 97%

“…However, a number of phase transitions can be induced in ReO 3 by applying external pressure [1,5,6] or by hydrogen insertion, that results in the formation of hydrogen rhenium bronzes H x ReO 3 [7][8][9].…”

mentioning

confidence: 99%

“…X-ray and neutron diffraction [1,5,6] and X-ray absorption spectroscopy (XAS) [10] studies has revealed that pressure effect results in a rotation (the Re-O-Re angle changes from 180° to 160°) of ReO 6 octahedra, but the octahedra remain regular with the Re-O bond length about 1.88±0.01 Å. Neutron diffraction study [9] of the hydrogen rhenium bronze D 1.36 ReO 3 showed that the hydrogen insertion produces similar effect on the ReO 3 structure. In particular, for x=1.36 the bronze structure is composed of tilted regular ReO 6 octahedra with the Re-O-Re angle equal to 169° and the Re-O distance of about 1.90 Å [9].…”

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confidence: 99%

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Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃

Gaidelene

Kuzmin

Purans

et al. 2005

phys. stat. sol. (c)

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PACS 61.10.Hb, 78.70.Dm In-situ X-ray absorption spectroscopy at the Re L 1 and L 3 edges was used to study a modification of the local atomic and electronic structure around rhenium in perovskite-type ReO 3 upon hydrogen intercalation. The analysis of both EXAFS and XANES parts of the X-ray absorption spectra shows an evidence of the charge disproportionation phenomenon in hydrogenated rhenium trioxide. and explaining the metallic conductivity of ReO 3 . These conduction electrons play also the main role in the stabilization of the cubic structure of ReO 3 [3]. While many perovskites, as for example SrTiO 3 , BaTiO 3 and KNbO 3 , show upon temperature change a series of phase transitions, caused by condensation of one or more optical modes [4] and accompanied by the electronic and atomic structure changes, the structure of ReO 3 remains non-distorted at atmospheric pressure down to liquid-helium temperature [3]. However, a number of phase transitions can be induced in ReO 3 by applying external pressure [1,5,6] or by hydrogen insertion, that results in the formation of hydrogen rhenium bronzes H x ReO 3 [7][8][9].X-ray and neutron diffraction [1,5,6] and X-ray absorption spectroscopy (XAS) [10] studies has revealed that pressure effect results in a rotation (the Re-O-Re angle changes from 180° to 160°) of ReO 6 octahedra, but the octahedra remain regular with the Re-O bond length about 1.88±0.01 Å. Neutron diffraction study [9] of the hydrogen rhenium bronze D 1.36 ReO 3 showed that the hydrogen insertion produces similar effect on the ReO 3 structure. In particular, for x=1.36 the bronze structure is composed of tilted regular ReO 6 octahedra with the Re-O-Re angle equal to 169° and the Re-O distance of about 1.90 Å [9]. More accurate information on the local atomic and electronic structure of the bronzes can be obtained using XAS, which is a structural method complimentary to diffraction. To our knowledge, no such works have been performed until now.In this work, we present the first results of the in-situ XAS study of hydrogen intercalation into ReO 3 . The analysis of both extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) allowed us to reconstruct changes of the local environment around rhenium ions occurring upon hydrogen intercalation and provides an evidence of charge ordering at rhenium sites.X-ray absorption spectra were recorded at the Re L 1 and L 3 -edges in transmission mode at the LURE DCI storage ring on the EXAFS-3 beam line, located at the bending magnet. The storage ring DCI oper-

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“…To conclude, the results obtained from the analysis of the Re L 1 and L 3 edges EXAFS and XANES signals show an evidence of the charge disproportionation phenomenon [19,20] [9]). …”

mentioning

confidence: 86%

mentioning

confidence: 97%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃

Gaidelene

Kuzmin

Purans

et al. 2005

phys. stat. sol. (c)

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“…Furthermore, the hydrogen bronze has been reported to react topotactically with various organic Lewis bases (10). Hydrogen can also be inserted at ambient temperature into various kinds of transition metal oxides by spillover (11)(12)(13). In this paper we report the hydrogen insertion of the blue potassium molybdenum bronze and the intercalation of n-alkylamines into the hydrated hydrogen insertion compound.…”

Section: Introductionmentioning

confidence: 95%

Soft Chemical Modification of Blue Potassium Molybdenum Bronze

Kinomura

Mizumoto

Kumada

1997

Journal of Solid State Chemistry

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Polymerization of methyltrioxorhenium(VII) organometallic oxides as precursors for oxide ceramics

1992

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The precursors Zr (BH,), and Hf(BH,), were synthesized from ZrCI, and HfCI, respectively, and LiBH, according to published procedures [I91 and were identified by mass spectrometry. Deposition was carried out in a parallel-plate reactor in a horizontal arrangement as described previously [20]. This reactor is O-ring sealed and with a roots blower (Edwards E2M40, EH2S0) reaches a base pressure of x0.5 Pa with a leaking rate of 4.7 x lo-' Pals-'. The precursors were transferred to glass reservoirs under an Ar atmosphere. For the deposition experiments these reservoirs were kept at 0 "C. At this temperature the vapor pressure of the borohydrides is sufficiently high and no carrier gas is required. The working gases H, and Ar were added to the precursor vapor shortly before it entered the reactor. The gas flows were controlled by mass-flow regulating valves (MKS). The total &as flow was 90 sccm of pure H, or of the mixture 70/20 sccm H,/Ar. The working pressure was about 40 Pa. The plasma was sustained by a 13.56 MHz generator (EN1 Model ACG-3). The substrates (glass, Si (100) and polished steel HWS 1.2379) were placed at the lower electrode. Prior to the deposition they were cleaned (30 min) in an Ar/H, plasma of 100 W. The deposited films were characterized by weight, thickness (Tencor Instruments, Alpha step 200), electrical resistivity (four-point probe method) and Knoop hardness (Leitz Miniload 2). For determination of the metal content the samples were dissolved in HCI/HNO, and the absorption of the arsenazo I11 complex at 670 nm was measured [21]. The complete analysis of the films was carried out by EPMA (electron probe microanalysis). The difference in metal content between these two methods is =Sat.%. In addition, tribological measurements (scratch test, Rockwell indentation) were performed with selected samples. The film surfaces were studied by SEM (scanning electron microscopy).

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The structure of a cubic hydrogen rhenium bronze, H1.36ReO3

Cited by 33 publications

References 8 publications

Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃

Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃

Soft Chemical Modification of Blue Potassium Molybdenum Bronze

Polymerization of methyltrioxorhenium(VII) organometallic oxides as precursors for oxide ceramics

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The structure of a cubic hydrogen rhenium bronze, H1.36ReO3

Cited by 33 publications

References 8 publications

Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO 3

Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO 3

Soft Chemical Modification of Blue Potassium Molybdenum Bronze

Polymerization of methyltrioxorhenium(VII) organometallic oxides as precursors for oxide ceramics

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Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃

Influence of hydrogen intercalation on the local structure around Re ions in perovskite‐type ReO ₃