Solubility of YbTe in Sb2Te3 and thermodynamic properties of the solid solution
摘要:
The solubility of YbTe in Sb2Te3 is investigated by a combination of DTA, XRD, SEM, and EMF methods. The fragment of the T-x phase diagram of the YbTe-Sb2Te3 system is constructed for 0-25 mol.% YbTe. It is shown that the solubility limit for YbTe in Sb2Te3 is achieved at 15 mol.% YbTe at 300 K and at 17.5 mol.% YbTe at 855 K. From the EMF measurements with an YbTe electrode the partial thermodynamic functions of the YbTe pseudo-component are calculated for the alloys of different compositions. Also, the standard integral thermodynamic functions of the YbTe dissolution in Sb2Te3 as well as the standard thermodynamic functions of formation and the standard entropy of the solid solution are calculated from the experimental data. (C) 2011 Elsevier B.V. All rights reserved.
Reduced Ternary Rare-Earth-Transition Metal Tellurides for the Smaller Rare-Earth Elements. An Exploration and an Explanation of the Marked Stability Differentiation among the Rare-Earth Elements in These Phases
作者:Nina Herzmann、Shalabh Gupta、John D. Corbett
DOI:10.1002/zaac.200801399
日期:2009.5
2}Tesub 2}-type (Imm2) have been identified and that for Dysub 7}Irsub 2}Tesub 2} has been refined. Seven new examples of other ternary structure types plus X-ray powder pattern evidence for 14 unknown phases have also been identified. To date the family of ternary R-Z-Te phases appears to be limited to those for R = Sc, Y, and Dy-Lu, a trend that is parallel to but more emphatic than those variations
已经综合探索了 RZ-Te 系统中存在更多富含金属的凝聚簇化合物的 R = Sc、Y、Pr、Dy、Er、Tm、Yb、Lu,主要是 Z = Ru、Rh、Pd、Ag 、Ir、Pt、Au。正交 Ersub 7}Nisub 2}Tesub 2} 型 (Imm2) 的 10 个新例子已经被确定,并且对于 Dysub 7}Irsub 2}Tesub 2} 的例子已经被改进。还确定了其他三元结构类型的七个新示例以及 14 个未知相的 X 射线粉末图案证据。迄今为止,三元 RZ-Te 相家族似乎仅限于 R = Sc、Y 和 Dy-Lu 的那些相,这种趋势与平行簇卤化物系统中发现的那些变化平行,但比这些变化更为突出。卤化物,尤其是碲化物系列的稳定性趋势很好地遵循 R 元素的 I1 + I2 和,
Phase diagram of the YbTe–Sb2Te3–Bi2Te3 quasi-ternary system
作者:Ziya S. Aliev、Konul D. Rasulova、Imamaddin R. Amiraslanov、Jean-Claude Tedenac、Mahammad B. Babanly
DOI:10.1016/j.jallcom.2013.11.225
日期:2014.3
quasi-ternary system were investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscope with energy dispersive analysis (SEM-EDS) techniques. Two isothermal sections of the system at 300 and 850 K, the projection of the liquidus surface as well as several isopleth sections were experimentally carried out. The boundary quasi-binary sections YbTe–Bi2Te3
Ba<sub>2</sub>Ln<sub>1−x</sub>Mn<sub>2</sub>Te<sub>5</sub> (Ln = Pr, Gd, and Yb; <i>x</i> = Ln vacancy): syntheses, crystal structures, optical, resistivity, and electronic structure
作者:Gopabandhu Panigrahi、Subhendu Jana、Mohd Ishtiyak、S. Narayanswamy、Pinaki P. Bhattacharjee、K. V. Ramanujachary、Manish K. Niranjan、Jai Prakash
DOI:10.1039/d1dt00057h
日期:——
Ba2Ln1−xMn2Te5 (Ln = Pr, Gd, and Yb), have been synthesized by the molten-flux method at 1273 K. The single-crystal X-ray diffraction studies at 298(2) K showed that Ba2Ln1−xMn2Te5 crystallize in the space group –C2/m of the monoclinic crystal system. There are six unique crystallographicsites in this structure's asymmetric unit: one Ba site, one Ln site, one Mn site, and three Te sites. The Ln site in the Ba2Ln1−xMn2Te5
通过熔融磁通量法在1273 K上合成了三个新的同构四元碲化物Ba 2 Ln 1− x Mn 2 Te 5(Ln = Pr,Gd和Yb)。 298(2)K表明,Ba 2 Ln 1− x Mn 2 Te 5在单斜晶体系统的空间群– C 2 / m中结晶。该结构的不对称单元中有六个独特的晶体学位点:一个Ba位点,一个Ln位点,一个Mn位点和三个Te位点。Ba 2 Ln 1− x Mn 2中的Ln位点Te 5结构被部分填充,这留下了大约三分之一的Ln位空着(□)的Pr和Gd化合物。这些结构不包含任何同原子或金属键,可以电荷平衡为(Ba 2+)2(Gd / Pr 3+)2/3(Mn 2+)2(Te 2-)5。Yb化合物的精炼组成为Ba 2 Yb 0.74(1) Mn 2 Te 5,并且可以通过Yb 2+ / Yb 3+的混合价态进行电荷平衡。Ba 2 Ln 1−的晶体结构X的Mn 2碲5包括复杂的层的2
Phase equilibria and decomposition of solid solutions in the YbTe–SnTe–PbTe system
作者:Z. S. Aliev、G. I. Ibadova、S. Z. Imamaliyeva、Yu. A. Yusibov、M. B. Babanly
DOI:10.1134/s0020168517080015
日期:2017.8
is characterized by the formation of a continuous series of high-temperature solidsolutions with a cubic structure (NaCl type), which undergo decomposition below ~1050 K. At room temperature, the YbTe solubility in the Sn1–x Pb x Te solidsolution system is ~33–35 mol %, whereas the extent of the YbTe-based solidsolution series does not exceed 3 mol %.
YbTe–SnTe–PbTe系统中的相平衡已使用差热分析,X射线衍射,扫描电子显微镜和对YbTe浓度池的电动势测量进行了研究。我们已经绘制出许多垂直剖面,YbTe–SnTe–PbTe相图的400K等温剖面以及其液相线和固相线表面的投影。结果表明,该系统的特征是形成了一系列连续的高温固溶体,呈立方结构(NaCl型),并在约1050 K以下分解。在室温下,YbTe在Sn 1– x Pb x Te固溶体体系约为33-35 mol%,而基于YbTe的固溶体系列的含量不超过3 mol%。
Low temperature routes to europium and ytterbium chalcogenides
作者:I.P. Parkin、J.C. Fitzmaurice
DOI:10.1016/s0277-5387(00)84600-8
日期:1993.1
Reaction of europium or ytterbium metal in liquid ammonia with sulphur, selenium or tellurium (at room temperature in a pressure tube) affords a convenient route to crystalline binary metal chalcogenides.