子化合物Sc5Pt24B12:一个充满scutterudite结构的Pt填充的变体. 电子和结构特性 电子和结构特性
Leonid Salamakha1,2, Oksana Sologub1, Berthold Stöger3
1Institute of Solid State Physics, TU Wien, A-1040 Vienna, Austria. salamakhaleonid@gmail.com.
Dalton transactions (Cambridge, England : 2003)
|December 1, 2023
概括
这项研究介绍了Sc5Pt24B12,一种具有独特晶体结构的新型化物化合物. 这种新材料在2.45K时表现出超导性,为进一步研究凝聚物质物理学开辟了道路.
科学领域:
- 固态化学 固态化学
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 已知化合物是Gd3Ni8Sn16类型 (RE5-xM12Sn24+x) 的第三级化物.
- 之前的研究集中在化物上,对类似的化物结构的探索有限.
研究的目的:
- 为了合成和描述一种新的化物化合物,Sc5Pt24B12.
- 确定其晶体结构并研究其化学键和电子特性.
- 为了探索其潜在的超导行为.
主要方法:
- 合成的弧融. 合成的弧融.
- 单晶X射线衍射用于结晶结构的确定.
- 密度函数理论 (DFT) 计算用于电子结构分析.
- 超导过渡温度 (Tc) 的测量.
主要成果:
- 确定了Sc5Pt24B12的晶体结构 (空间组Im-3,a = 10.2042(6) Å).
- Sc5Pt24B12是化物结构类型的第一个位点交换变体的化物代表.
- 电子结构计算揭示了Sc,Pt和B状态在费米水平上的优势.
- 旋转轨道合显著影响带结构.
- 在过渡温度为Tc = 2.45 K时观察到超导性.
结论:
- Sc5Pt24B12代表了一种具有离子相互作用的新类子化合物.
- 电子结构表明涉及Sc,Pt和B原子的复杂结合.
- 在2.45K时观察到的超导率突出显示了该材料的潜力,需要进一步研究.
更多相关视频
08:00Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
11.1K
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
376
相关概念视频
02:42Ionic Crystal Structures
14.4K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.4K
02:58Crystal Field Theory - Octahedral Complexes
26.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.6K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.7K
02:42Valence Bond Theory
8.6K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.6K
02:52VSEPR Theory and the Basic Shapes
68.4K
Overview of VSEPR Theory
68.4K
02:37Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K