Coordination change of Te atoms in binary tellurite glasses

Himei, Yusuke; Osaka, Akiyoshi; Nanba, Tokuro; Miura, Yoshio

doi:10.1016/0022-3093(94)90526-6

Cited by 136 publications

(62 citation statements)

References 7 publications

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“…The IR spectrum of pure crystalline and amorphous V 2 O 5 is characterized by the intense band in the range 1000-1020 cm -1 , related to vibration of isolated V=O vanadyl groups in [VO 5 ] trigonal bipyramids [8][9][10]; the peak around 850 and 910 cm -1 to the vibrations of [VO 5 ] units, whereas the band in range 950-970 cm -1 was attributed to [VO 4 ] units [11][12][13][14]. …”

Section: Ftir Spectroscopymentioning

confidence: 97%

The local structure of gadolinium vanadate–tellurate glasses and glass ceramics: Te2V2O9 crystalline phase

et al. 2009

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Glasses in the system xGd 2 O 3 Á (100 -x) [0.7TeO 2 Á 0.3V 2 O 5 ] with 0 B x B20 mol% have been prepared from melt quenching method. Influence of gadolinium ions on structural behavior in vanadate-tellurate glasses has been investigated using FTIR spectroscopy, X-ray diffraction (XRD), and magnetic susceptibility measurements. The structural changes have been analyzed with increasing rare earth concentration. The structural changes, as recognized by analyzing band shapes of XRD and FTIR spectra, revealed that Gd 2 O 3 causes a higher extent of network polymerization as far as 20 mol%. The structure of the heat-treated glasses was found to consist mainly of the Te 2 V 2 O 9 crystalline phase. These vitreous systems were investigated by magnetic susceptibility measurements. From the paramagnetic susceptibility v was calculated at different temperature and from the 1/v(T) graph, the Curie temperature of the glass has been evaluated. Magnetic susceptibility data show the presence of small antiferromagnetic interactions between the Gd ?3 ions.

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Section: Ftir Spectroscopymentioning

confidence: 97%

The local structure of gadolinium vanadate–tellurate glasses and glass ceramics: Te2V2O9 crystalline phase

et al. 2009

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“…Recently, it was establish ed that in the valence band photoelectron spectra of crystalline and vitreous TeO2 the peak at about 12eV main ly conists of Te 5s outermost orbitals while the band at about 3eV is mainly composed of O2p orbitals. 38) 4. Conclusions It is established on the basis of the similarity in physical nature between ionization energy and electron binding energy that a close correlation exists between free-ion polarizability and metal (or nonmetal) outermost binding energy of the elements.…”

Section: Introductionmentioning

confidence: 99%

Electronic Ion Polarizability, Optical Basicity and Metal (or Nonmetal) Binding Energy of Simple Oxides.

Dimitrov

Komatsu

1999

J. Ceram. Soc. Japan

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A suitable relationship between free-ion polarizability and metal (or nonmetal) outermost binding energy has been searched on the basis of the similarity in physical nature between electron binding energy and ionization energy. It has been suggested that outermost core-level binding energy can be used for relative measuring the cation polarizability. In general, cation polarizability increases with decreasing metal (or nonmetal) binding energy. Highly polarizable cations possess low outermost binding energy. Simultaneous ly, a systematic periodic change of the polarizability against the binding energy has been observed in the isoelectronic series. A decreasing of metal (or nonmetal) binding energy in XPS spectra of simple oxides is accompanied with decreasing of O1s binding energy, that is related to increased basicity. This could be ex plained on the basis of enhanced interaction between outermost metal core level and O2p orbitals responsi ble to increased electron donor ability of oxide ion.

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“…Suzuki determined the coordination numbers around Te atoms for BaO-TeO2 glasses by neutron diffraction. 9) Himei et al 13) estimated the,molar ratio of TeO3/TeO4 for R2O-TeO2 (R=Li, Na and K) and MO-TeO2 (M=Ba and Zn) glasses from the intensity ratio of Raman bands and pro posed a structure model of these tellurite glasses. Never theless, the more detailed structure of MO-TeO2 glasses has not been made clear yet.…”

Section: Introductionmentioning

confidence: 99%