ANOMALIES OF PROPERTIES AND STRUCTURE OF M_(1-x)R_xF_(2+x)CRYSTALS

机译：M_（1-x）R_xF_（2 + x）晶体的性质和结构异常

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Peculiarities of the non-stochiometry M_(1-x)R_xF_(2+x) phase has been studied by examples of BaF_2 and Ba_(1-x)La_xF_(2+x). The BaF_2 and Ba_(1-x) La_xF_(2+x) are of the same structural organization: the matrix with the CaF_2 lattice contains precipitates of 2nd phase, conceivably, of the BaF_(2-δ)F'_δ high-temperature phase in BaF_2, and unknown "particles" in Ba_(1-x)La_xF_(2+x). In both the cases, planes with the quadratic atomic nets are parallel to planes with the hexagonal nets, that testifies to possible genetic relationship between structural organization in BaF_2 and Ba_(1-x)La_xF_(2+x). "Defect volumes" display proper reflections in electron diffraction patterns in some conditions, but otherwise these reflections are invisible. Lack of reflections is concerned with specific structure of Ba_(1-x)La_xF_(2+x), which consists of two phases with the completely fitted lattices. A few anomalies of Ba_(1-x)La_xF_(2+x). (and, possibly, other non-stochiometry fluorides with the CaF_2 structure) can be explained by the specificity of this phase fitting.

机译：通过BaF_2和Ba_（1-x）La_xF_（2 + x）的实例研究了非化学计量学M_（1-x）R_xF_（2 + x）相的特殊性。 BaF_2和Ba_（1-x）La_xF_（2 + x）具有相同的结构组织：带有CaF_2晶格的基体包含第二相的沉淀，这可能是BaF_（2-δ）F'_δ高温的BaF_2中的相态和Ba_（1-x）La_xF_（2 + x）中未知的“粒子”。在这两种情况下，具有二次原子网的平面都与具有六角网的平面平行，这证明了BaF_2和Ba_（1-x）La_xF_（2 + x）的结构组织之间可能存在遗传关系。在某些情况下，“缺陷体积”会在电子衍射图中显示适当的反射，但否则这些反射是不可见的。缺少反射与Ba_（1-x）La_xF_（2 + x）的特定结构有关，该结构由两相完全匹配的晶格组成。 Ba_（1-x）La_xF_（2 + x）的一些异常。（以及可能的其他具有CaF_2结构的非化学计量的氟化物）可以通过这种相位拟合的特异性来解释。

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《International Conference on Single Crystal Growth and Heat amp; Mass Transfer(ICSC-2003) vol.2; 20030922-26; Obninsk(RU)》|2003年|P.379-388|共10页
会议地点 Obninsk(RU)
作者
Maksimov S.K.; Avilov A.S.; Sobolev B.P.; Herrero P.;
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Moscow Institute of Electronic Technology (Technical University), (Moscow, Russia);

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正文语种 eng
中图分类晶体生长工艺;
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ANOMALIES OF PROPERTIES AND STRUCTURE OF M_(1-x)R_xF_(2+x)CRYSTALS

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