相关实验视频
Updated: Jul 11, 2025
08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
18.0K
K3FeTe2O8(OH)2(H2O)1+x的秩序障碍 (OD) 多种类型
Tobias Wolflehner1, Berthold Stöger1
1X-Ray Centre, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
概括
研究人员合成了一种新的铁化物化合物,K3FeTe2O8(OH) 2(H2O) 2,显示出复杂的多类型晶体结构. 这一发现促进了对无机材料的理解,在材料科学中具有潜在的应用.
科学领域:
- 无机化学 无机化学 有机化学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 热水合成为创建新型无机化合物提供了一条通用的途径.
- 了解复杂的晶体结构对于预测材料特性至关重要.
- 多型性,即化合物在不同的结构中结晶的现象,在表征方面提出了挑战.
研究的目的:
- 为了合成和表征一种新的无机化合物,K3FeTe2O8(OH) 2(H2O) 2.
- 为了阐明晶体结构,并研究这种材料中的多样性现象.
- 探索水分子在晶体结构中的热行为.
主要方法:
- 使用酸六水合物 (Te(OH) 6),铁 (II) 硫酸三水合物 (FeSO4·7H2O) 和氧化 (KOH) 的热水合成.
- 进行X射线衍射分析,包括系统的一维扩散散射.
- 秩序-混乱理论和结构因子计算用于结构分析的应用.
- 热分析用于研究水分子的去除.
主要成果:
- 成功合成了K3FeTe2O8 ((OH) 2 ((H2O) 2) 的合成.
- 晶体结构具有三周期网络,有无序的水分子在道中,可以通过加热去除.
- 多型的证据,具有主要的单临床多型 (伪正合体指标) 与正合体片段相间隔.
- 结构分析通过衍射强度和结构因子计算得到证实.
结论:
- K3FeTe2O8 ((OH) 2 ((H2O) 2) 是一种具有复杂多类型晶体结构的新型无机化合物.
- 该物质表现出秩序-混乱现象,这是多类型化合物的特征.
- 水分子的存在和热可变性是其关键的结构特征.
更多相关视频
07:24Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
6.1K
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
10.7K
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
03:24Common Ion Effect
41.8K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
41.8K
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
01:09Solubility Equilibria: Overview
691
When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
Solubility is important in biological and environmental processes. A notable...
691
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
02:58Crystal 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