Crystal structure and phase transition in the doped super-ionic conductor bismuth vanadate Bi_4(V,Fe)_2O_(11) revealed by neutron diffraction

Golosovsky I.V.; Golubko N.V.; Mosunov A.V.; Politova E.D.; Murasheva V.V.; Fortalnova E.A.; Rusakov V.S.; André G.; Porcher F.

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Crystal structure and phase transition in the doped super-ionic conductor bismuth vanadate Bi_4(V,Fe)_2O_(11) revealed by neutron diffraction

机译：中子衍射揭示掺杂超离子导体钒酸铋Bi_4（V，Fe）_2O_（11）的晶体结构和相变

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Bismuth vanadate Bi_4V_2O_9(11-y) doped with Fe was studied by neutron diffraction. It was shown that Fe substitutes V only partially and the redundant iron forms an impurity hematite phase. In the sample with nominal content Bi_4(V_(0.96)Fe_(0.04))_2O_(11-y) a new phase transition within the frame of the monoclinic structure with the appearing of inversion center was discovered in the temperature region 200-300°C. This transition was also confirmed by DTA experiments. Slow stabilization of the crystal structure with stabilization times of the order of hours, accompanied by a decrease of the unit cell volume, was observed. At high level of Fe doping, in addition to the dominant tetragonal γ-phase some amount of the nanosized monoclinic α-phase was detected.

机译：通过中子衍射研究了钒掺杂铋钒酸盐Bi_4V_2O_9（11-y）。结果表明，Fe仅部分替代V，而多余的铁形成了赤铁矿杂质相。在标称含量为Bi_4（V_（0.96）Fe_（0.04））_ 2O_（11-y）的样品中，在200-300°的温度区域内发现了单斜晶结构内新的相变并出现了反转中心。 C。 DTA实验也证实了这种转变。观察到具有数小时的稳定时间的晶体结构的缓慢稳定，伴随着晶胞体积的减小。在高水平的Fe掺杂下，除了主要的四方γ相外，还检测到了一定数量的纳米级单斜晶α相。

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《Physica status solidi, B. Basic research》 |2013年第7期|共7页
作者
Golosovsky I.V.; Golubko N.V.; Mosunov A.V.; Politova E.D.; Murasheva V.V.; Fortalnova E.A.; Rusakov V.S.; André G.; Porcher F.;
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正文语种 eng
中图分类固体物理学;
关键词
Bismuth vanadate; Crystal structure; Ionic conductors; Neutron diffraction; Phase transitions;

机译：钒酸铋;晶体结构;离子导体;中子衍射;相变;

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1. Crystal structure and phase transition in the doped super-ionic conductor bismuth vanadate Bi_4(V,Fe)_2O_(11) revealed by neutron diffraction [J] . Golosovsky I.V., Golubko N.V., Mosunov A.V., Physica status solidi, B. Basic research . 2013,第7期

机译：中子衍射揭示掺杂超离子导体钒酸铋Bi_4（V，Fe）_2O_（11）的晶体结构和相变
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Crystal structure and phase transition in the doped super-ionic conductor bismuth vanadate Bi_4(V,Fe)_2O_(11) revealed by neutron diffraction

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