Second-sphere ligand field effects on oxygen ligator atoms and experimental evidence—the transition metal–oxygen bond in oxidic solids

Reinen, D.; Atanasov, M.; Lee, Show-Ling

doi:10.1016/s0010-8545(98)00181-7

Cited by 60 publications

(40 citation statements)

References 55 publications

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“…For instance, it was reported that second coordination sphere effects modify the ligand field splitting in DP's, where a 3d element is the magnetic and a 4d/5d element the non-magnetic component. [23,36,37] One can then also envision that the virtual electronic excitations involving the Y d 0 cations are different in type and energy than those involving the In d 10 cations. The slight differences in electronic structure will modify the strength of the NN and NNN Os-Os exchange interactions.…”

Section: Discussionmentioning

confidence: 99%

“…In case of antiferromagnetic inter-site exchange such DP's are interesting model systems for studying magnetic frustration in an fcc sublattice. Herein, we report the synthesis, structural and magnetic characterization as well as the magnetic structures of DP's contain- [23] In addition, we also reinvestigated the magnetic properties of Sr 2 ScOsO 6 , where in a previous work no magnetic phase transition was apparent. [24] Also Sr 2 InOsO 6 has been mentioned previously as a cubic DP, [25] but no physical properties have been investigated.…”

Section: Dedicated Clustermentioning

confidence: 95%

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Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Paul

Sarapulova²,

Adler³

et al. 2015

Zeitschrift anorg allge chemie

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Abstract. Double perovskites Sr 2 BOsO 6 (B = Y, In, and Sc) were prepared from the respective binary metal oxides, and their structural, magnetic, and electronic properties were investigated. At room temperature all these compounds crystallize in the monoclinic space group P2 1 /n. They contain magnetic osmium (Os 5+ , t 2g 3 ) ions and are antiferromagnetic insulators with Néel temperatures T N = 53 K, 26 K, and 92 K for B = Y, In, and Sc, respectively. Powder neutron diffraction

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Section: Discussionmentioning

confidence: 99%

Section: Dedicated Clustermentioning

confidence: 95%

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Paul

Sarapulova²,

Adler³

et al. 2015

Zeitschrift anorg allge chemie

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“…The oxide was identified through the JCPDF card-file 38-1083. According to this, the oxide belongs to the materials with a trirutile-like structure [16], crystallizing with a space group P4 2 /mnm (136) [17][18][19][20][21] and cell parameters = 4.641Å and = 9.223Å. The width of the peaks in the diffractogram is indicative of a small particle size with a low noise level, which means a sample with high crystallinity [22].…”

Section: Xrd Analysis the X-ray Diffraction Pattern Of The Calcined mentioning

confidence: 99%

Gas Sensing Properties of NiSb₂O₆ Micro- and Nanoparticles in Propane and Carbon Monoxide Atmospheres

Rodríguez-Betancourtt

Guillén-Bonilla

Flores

et al. 2017

Journal of Nanomaterials

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Micro-and nanoparticles of NiSb 2 O 6 were synthesized by the microwave-assisted colloidal method. Nickel nitrate, antimony chloride, ethylenediamine, and ethyl alcohol were used. The oxide was obtained at 600 ∘ C and was analyzed by X-ray diffraction (XRD) and Raman spectroscopy, showing a trirutile-type structure with cell parameters = 4.641Å, = 9.223Å, and a space group P4 2 /mnm (136). Average crystal size was estimated at ∼31.19 nm, according to the XRD-peaks. The microstructure was scrutinized by scanning electron microscopy (SEM), observing microrods measuring ∼3.32 m long and ∼2.71 m wide, and microspheres with an average diameter of ∼8 m; the size of the particles shaping the microspheres was measured in the range of ∼0.22 to 1.8 m. Transmission electron microscopy (TEM) revealed that nanoparticles were obtained with sizes in the range of 2 to 20 nm (∼10.7 nm on average). Pellets made of oxide's powders were tested in propane (C 3 H 8 ) and carbon monoxide (CO) atmospheres at different concentrations and temperatures. The response of the material increased significantly as the temperature and the concentration of the test gases rose. These results show that NiSb 2 O 6 may be a good candidate for gas sensing applications.

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“…25,26 By contrast, many other authors have suggested that unpaired electrons are not fully localized on the CrO 6 9− complex as they are also present in the second and further coordination spheres, which are not the same in ruby and emerald. 2,[27][28][29] According to this view the flow of electronic charge outside the CrO 6 9− complex would be responsible for the different 10Dq value exhibited by gemstones like ruby and emerald.…”

mentioning

confidence: 99%

Internal electric fields and color shift in Cr3+-based gemstones

et al. 2012

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Seeking to better understand the origin of the different colors of emerald and ruby, both ab initio periodic and cluster calculations have been carried out. impurities along the series of ionic oxides can be understood merely through the CrO 6 9− unit but subject to the electric field due to the rest of the lattice ions. As a salient feature it is proved that changes in electronic density and covalency due to the internal field are not the cause of the color shift. Therefore, the red color of ruby is not due to the polarization of the electronic cloud around chromium as a result of the C 3 local symmetry. The present study also demonstrates that the variation of the ligand field splitting parameter, 10Dq, induced by the internal electric field comes mainly from the contributions of first shells of ions around the CrO 6 9− unit. As a consequence, 10Dq in emerald is not influenced by the internal field, as the contribution from Be 2+ first neighbors is practically compensated by that of Si 4+ second neighbors. In contrast, in ruby the t 2g levels are shifted by the internal field 0.24 eV more than the e g ones, so explaining the color shift in this gemstone in comparison with emerald. This result is shown to arise partially from the asymmetric form of the internal electrostatic potential along the C 3 axis in Al 2 O 3 .

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Second-sphere ligand field effects on oxygen ligator atoms and experimental evidence—the transition metal–oxygen bond in oxidic solids

Cited by 60 publications

References 55 publications

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Gas Sensing Properties of NiSb₂O₆ Micro- and Nanoparticles in Propane and Carbon Monoxide Atmospheres

Internal electric fields and color shift in Cr3+-based gemstones

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Second-sphere ligand field effects on oxygen ligator atoms and experimental evidence—the transition metal–oxygen bond in oxidic solids

Cited by 60 publications

References 55 publications

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr2BOsO6 (B = Y, In, Sc)

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr2BOsO6 (B = Y, In, Sc)

Gas Sensing Properties of NiSb2O6 Micro- and Nanoparticles in Propane and Carbon Monoxide Atmospheres

Internal electric fields and color shift in Cr3+-based gemstones

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Product

Resources

About

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Magnetically Frustrated Double Perovskites: Synthesis, Structural Properties, and Magnetic Order of Sr₂BOsO₆ (B = Y, In, Sc)

Gas Sensing Properties of NiSb₂O₆ Micro- and Nanoparticles in Propane and Carbon Monoxide Atmospheres