Single Crystals of the Fluorite Nonstoichiometric Phase Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084)(Conductivity, Transmission, and Hardness)

B. P. Sobolev; T. M. Turkina; N. I. Sorokin; D. N. Karimov; O. N. Komar’kova; E. A. Sulyanova

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Single Crystals of the Fluorite Nonstoichiometric Phase Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084)(Conductivity, Transmission, and Hardness)

机译：萤石非化学计量相的单晶Eu_（0.916）〜（2+）Eu_（0.084）〜（3+）F_（2.084）（电导率，透射率和硬度）

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The nonstoichiometric phase EuF_(2+x) has been obtained via the partial reduction of EuF_3 by elementary Si at 900–1100°C. Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084)(EuF_(2.084)) single crystals have been grown from melt by the Bridgman method in a fluorinating atmosphere. These crystals belong to the CaF_2 structure type (sp. gr. Fm3m) with the cubic lattice parameter a = 5.8287(2) ?, are transparent in the spectral range of 0.5–11.3 μm, and have microhardness H_μ = 3.12 ± 0.13 GPa and ionic conductivity σ = 1.4 × 10~(–5) S/cm at 400°C with the ion transport activation energy E_a = 1.10 ± 0.05 eV. The physicochemical characteristics of the fluorite phases in the EuF_2 – EuF_3 systems are similar to those of the phases in the SrF_2 – EuF_3 and SrF_2 –GdF_3 systems due to the similar lattice parameters of the EuF2 and SrF2 components. Europium difluoride supplements the list of fluorite components MF_2 (M = Ca, Sr, Ba, Cd, Pb), which are crystal matrices for nonstoichiometric (nanostructured) fluoride materials M_(1 – x)R_xF_(2 + x) (R are rare earth elements).

机译：非化学计量相EuF_（2 + x）是通过在900–1100°C下用元素Si对EuF_3进行部分还原而获得的。 Eu_（0.916）〜（2+）Eu_（0.084）〜（3+）F_（2.084）（EuF_（2.084））的单晶已经在氟化气氛下通过Bridgman方法从熔体中生长出来。这些晶体属于具有立方晶格参数a = 5.8287（2）？的CaF_2结构类型（sp。gr。Fm3m），在0.5–11.3μm的光谱范围内是透明的，并且显微硬度H_μ= 3.12±0.13 GPa和离子电导率σ= 1.4×10〜（–5）S / cm在400°C时，离子迁移活化能E_a = 1.10±0.05 eV。由于EuF2和SrF2组分的晶格参数相似，EuF_2 – EuF_3系统中萤石相的理化特性与SrF_2 – EuF_3和SrF_2 –GdF_3系统中的相类似。二氟化补充了萤石成分MF_2（M = Ca，Sr，Ba，Cd，Pb），这是非化学计量（纳米结构）氟化物材料M_（1-x）R_xF_（2 + x）的晶体矩阵（R很少见地球元素）。

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《Crystallography reports》 |2010年第4期|共5页
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B. P. Sobolev; T. M. Turkina; N. I. Sorokin; D. N. Karimov; O. N. Komar’kova; E. A. Sulyanova;
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1. Single Crystals of the Fluorite Nonstoichiometric Phase Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084)(Conductivity, Transmission, and Hardness) [J] . B. P. Sobolev, T. M. Turkina, N. I. Sorokin, Crystallography reports . 2010,第4期

机译：萤石非化学计量相的单晶Eu_（0.916）〜（2+）Eu_（0.084）〜（3+）F_（2.084）（电导率，透射率和硬度）
2. КРИСТАЛЛЫ ФЛЮОРИТОВОЙ НЕСТЕХИОМЕТРИЧЕСКОЙ ФАЗЫ Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084) (ПРОВОДИМОСТЬ, ПРОПУСКАНИЕ, ТВЕРДОСТЬ) [J] . Б. П. Соболев, Т М. Туркина, Н. И. Сорокин, Кристаллография . 2010,第4期

机译：氟非化学计量相的晶体Eu_（0.916）〜（2+）Eu_（0.084）〜（3+）F_（2.084）（电导率，透射率，硬度）
3. КРИСТАЛЛЫ ФЛЮОРИТОВОЙ НЕСТЕХИОМЕТРИЧЕСКОЙ ФАЗЫ Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084) (ПРОВОДИМОСТЬ, ПРОПУСКАНИЕ, ТВЕРДОСТЬ) [J] . Б. П. Соболев, Т М. Туркина, Н. И. Сорокин, Кристаллография . 2010,第4期

机译：萤石非分离型相EU_（0.916）〜（2+）EU_（0.084）〜（3+）F_（2.084）（电导率，传输，硬度）的晶体
4. (Gd_(0.95)Eu_(0.05))(OH)_3 Nanomaterials via hydrothermal Processing and Their Transformation into Single Crystalline (Gd_(0.95)Eu_(0.05))(OH)_3 with Enhanced Photoluminescence [C] . Changfa Li, Ji-guang Li International Conference on Key Engineering Materials and Computer Science . 2011

机译：（GD_（0.95）EU_（0.05））（OH）_3纳米材料通过水热处理及其转化成单晶（GD_（0.95）EU_（0.05））（OH）_3，具有增强的光致发光
5. Structural/magnetic phase transitions and superconductivity in barium (iron-TM) arsenide (TM = cobalt, nickel, copper, cobalt/copper, rhodium and palladium) single crystals. [D] . Ni, Ni. 2009

机译：钡（铁-TM）砷化物（TM =钴，镍，铜，钴/铜，铑和钯）单晶的结构/磁性相变和超导性。
6. Enhancement of superconductivity under pressure and the magnetic phase diagram of tantalum disulfide single crystals [O] . M. Abdel-Hafiez, X.-M. Zhao, A. A. Kordyuk, -1

机译：压力下超导性的增强和二硫化钽单晶的磁相图
7. Magnetism and superconductivity in single crystals $Eu_{1-x}Sr_xFe_{2-y}Co_{y}As_2$ [O] . Zheng, Q. J., He, Y., Wu, T., 2009

机译：单晶中的磁性和超导性 $ Eu_ {1-X} sr_xFe_ {2-Y} CO_ {Y} as_2 $
8. Electrical Conductivities of Single Phase Fluorite Structure Compositions in the HfO sub 2 -Er sub 2 O sub 3 and HfO sub 2 -Er sub 2 O sub 3 -Ta sub 2 O sub 5 Systems [R] . Jordan, G. W. 1984

机译：HfO sub 2 -Er sub 2 O sub 3和HfO sub 2 -Er sub 2 O sub 3 -Ta sub 2 O sub 5 systems中单相萤石结构组合物的电导率

Single Crystals of the Fluorite Nonstoichiometric Phase Eu_(0.916)~(2+)Eu_(0.084)~(3+)F_(2.084)(Conductivity, Transmission, and Hardness)

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