2010
DOI: 10.1007/s10973-010-0783-z
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Thermochemical properties of MnNb2O6

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Cited by 14 publications
(5 citation statements)
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“…9,10 After that, Arroyoy de Dompablo performed a computational study on the stability and electronic properties of oxygen vacancies in MNb 2 O 6 (M = Mn, Fe, Co, Ni, Cu); he found that the oxygen vacancy formation induces (a) a narrowing of the band gap and (b) an electronic density redistribution leading to the reduction of Nb 5+ to lower oxidation states. 11 Additionally, Mansurova supplemented the absence of the thermodynamic properties of MnNb 2 O 6 , 12 and Husson performed Raman study on MnNb 2 O 6 and a theory calculation about the vibration modes. 13,14 At ambient condition, the columbite MnNb 2 O 6 crystallizes in a derivative of the a-PbO 2 -type, in which the oxygen atoms assume a distorted HCP configuration and the cations occupy one-half of the available octahedral interstices.…”
Section: Introductionmentioning
confidence: 99%
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“…9,10 After that, Arroyoy de Dompablo performed a computational study on the stability and electronic properties of oxygen vacancies in MNb 2 O 6 (M = Mn, Fe, Co, Ni, Cu); he found that the oxygen vacancy formation induces (a) a narrowing of the band gap and (b) an electronic density redistribution leading to the reduction of Nb 5+ to lower oxidation states. 11 Additionally, Mansurova supplemented the absence of the thermodynamic properties of MnNb 2 O 6 , 12 and Husson performed Raman study on MnNb 2 O 6 and a theory calculation about the vibration modes. 13,14 At ambient condition, the columbite MnNb 2 O 6 crystallizes in a derivative of the a-PbO 2 -type, in which the oxygen atoms assume a distorted HCP configuration and the cations occupy one-half of the available octahedral interstices.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the electrical properties of columbite MnNb 2 O 6 have been explored experimentally with the aim of inducing mixed ionic-electronic conductivity. , After that, Arroyoy de Dompablo performed a computational study on the stability and electronic properties of oxygen vacancies in MNb 2 O 6 (M = Mn, Fe, Co, Ni, Cu); he found that the oxygen vacancy formation induces (a) a narrowing of the band gap and (b) an electronic density redistribution leading to the reduction of Nb 5+ to lower oxidation states . Additionally, Mansurova supplemented the absence of the thermodynamic properties of MnNb 2 O 6 , and Husson performed Raman study on MnNb 2 O 6 and a theory calculation about the vibration modes. , …”
Section: Introductionmentioning
confidence: 99%
“…16 Recently, Mansurova et al have investigated the thermochemical properties of MnNb 2 O 6 . 17 As we know, these prominent physical and chemical properties should be associated with its crystal structure. It is well-known that columbite can be considered as a superstructure of R-PbO 2 .…”
Section: Introductionmentioning
confidence: 99%
“…Among them, solid state combination has always been the most popular technique for the synthesis of polycrystalline MnNb 2 O 6 powders, using stoichiometric mixtures of Nb 2 O 5 and MnO or MnCO 3 at high temperatures (≥1100 °C). [3][4][5][6][7][12][13][14]16,17 However, multiple heating and regrinding steps are generally essential to overcome the solid state diffusion barrier. Additionally, the products always have irregular morphology and large particle size.…”
Section: Introductionmentioning
confidence: 99%
“…However, the powders obtained by solid-phase processes, which need to be run at high temperatures, have a large particle size. Especially on synthesizing MnNb 2 O 6 , it is necessary not only to heat at 1100 • C or over but also to control the atmosphere conditions carefully [18,19] [33,34]. Each of them have some drawbacks, such as the requirement of removing alkali metals (K, Na) from the prepared powder (1), the need for pretreatment (dissolving Nb 2 O 5 in 40% HF solution for 10 h), or complicated processing (2,3).…”
Section: Introductionmentioning
confidence: 99%