相关实验视频

Updated: May 24, 2025

$High Pressure Single Crystal Diffraction at PX^2$

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

高压单晶X射线衍射研究ErVO₄的研究

Josu Sánchez-Martín¹, Gastón Garbarino², Samuel Gallego-Parra²

¹Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain.

Inorganic chemistry

|February 28, 2025

概括

瓦纳酸 (ErVO4) 在7.9GPa时从子转变为石结构. 这项研究精确地绘制了其在高压下结构变化和机械特性,没有显示相位共存或预测过渡.

科学领域:

固态化学固态化学
材料科学是一种材料科学.
晶体学晶体学是指结晶学.

背景情况:

了解稀土瓦纳达的高压行为对于材料科学至关重要.
瓦纳酸 (ErVO4) 是一种材料,其潜在应用受其结构相位过渡的影响.

研究的目的:

在变压下研究ErVO4的晶体结构演变.
为了精确确定相位过渡压力和状态方程.
研究机械性能,并将实验发现与理论预测进行比较.

主要方法:

使用作为压力介质的高压单晶X射线衍射.
结构的精细化高达24.1GPa.
密度函数理论对机械性质的计算.

主要成果:

在7.9 GPa时观察到从石到石石结构的相位过渡.
没有发现相位共存的证据,与之前的一些报告相反.
确定了两个阶段的精确线性压缩性和压力-体积状态方程.
使用密度函数理论计算机械性能.

结论:

在ErVO4中,石转化为石石发生在7.9 GPa时,没有相位共存.
实验结果提供了关于压缩性和状态方程的准确数据.
发现了关于二次相转换的理论预测与理论预测的差异.

更多相关视频

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$ 07:26

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

An Externally-Heated Diamond Anvil Cell for Synthesis and Single-Crystal Elasticity Determination of Ice-VII at High Pressure-Temperature Conditions

Published on: June 18, 2020

相关概念视频

$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...

X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...