Dissociation energies of the molecules CrPO2(g) and CrO(g) by high-temperature mass spectrometry
作者:G. Balducci、G. Gigli、M. Guido
DOI:10.1039/f29817701107
日期:——
investigated in the course of a high-temperature mass-spectrometricKnudsen-cell study of the vapours over an europium–chromium–phosphorus–oxygen system. From the enthalpy of the equilibrium reaction CrPO2(g)= CrO(g)+PO(g) and appropriate ancillary data, the atomization energy of this molecule has been determined. In addition, the dissociationenergy of CrO(g) has been obtained through the study of
Rare earth tungsten bronzes: a new method of synthesis. Perspectives for their application as inert matrices for transmutation of long-life actinide elements
reveal a cubic perovskite structure. The lanthanide content in bronzes was determined by optical spectroscopy analysis. The experimental density of the pressed bronze samples was estimated at 6.58 g cm−3, i.e., 89% of the crystallographic value. The thermal stability of the bronzes synthesized was checked up to 900°C in an inert atmosphere. Leaching tests were performed for europium bronzes in nitric
提出了一种基于多氧钨酸盐化合物的热降解合成镧系元素(Ln)Nd和Eu的钨极氧化物钨青铜的新方法。该方法的简便性允许将具有化学式Ln x WO 3的这类化合物视为中子反应堆中次act系元素Am和Cm焚烧或trans变的潜在惰性靶标。Nd和Eu被用作跨p元素的类似物。合成化合物的粉末X射线衍射图谱显示立方钙钛矿结构。青铜中镧系元素的含量通过光谱分析法确定。压制青铜样品的实验密度估计为6.58 g cm -3,即为晶体学值的89%。在惰性气氛下,检查合成的青铜的热稳定性,最高至900°C。使用发光技术在硝酸溶液中对euro青铜进行了浸出测试。
Extending the temperature sensing range using Eu<sup>3+</sup> luminescence up to 865 K in a single crystal of EuPO<sub>4</sub>
作者:Suchinder K. Sharma、Thomas Köhler、Jan Beyer、Margret Fuchs、Richard Gloaguen、Johannes Heitmann
DOI:10.1039/c9cp03501j
日期:——
Extending the temperature sensing range up to 865 K using an appropriate choice of excitation wavelength and coupling scheme in a single crystal sample of EuPO4.
在EuPO4的单晶样品中,通过选择适当的激发波长和耦合方案,将温度感应范围扩展到865 K。
Semiconductor to metal transition in Ln2Mo3O9 compounds
作者:Fanian Shi、Jian Meng、Yufang Ren
DOI:10.1016/0025-5408(95)00127-1
日期:1995.10
La, Ce, Pr, Nd, Sm, Gd and Dy). The new compound Ce2Mo3O9 has the same structure as other Ln(2)Mo(3)O(9) compounds. All of the products are single phase materials and crystallize in a tetragonal scheelite type structure with Mo2O6 clusters. The IR spectra of the Ln(2)Mo(3)O(9) oxides show two absorption bands. These compounds are black n-type semiconductors, and exhibit Curie-Weiss Law behavior from
Synthesis and crystal structure of the rare earth borogermanate EuGeBO<sub>5</sub>
作者:Yang Chi、Yan Zhuang、Sheng-Ping Guo
DOI:10.1515/znb-2016-0107
日期:2017.2.1
Abstract The synthesis and crystalstructure of the rareearth borogermanate EuGeBO5 are reported. It is synthesized by high-temperature solid-state reaction and crystallizes in the monoclinic space group P21/c (no. 14) with the unit cell parameters a=4.8860(5), b=7.5229(8), c=9.9587(10) Å, and β=91.709(3)°. Its crystalstructure features a polyanion-type layer (GeBO5)3− constructed by BO4 and GeO4