Lecture

Transmission of Zinc: X-ray Diffraction and Wavelength Variation

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Description

This lecture discusses the transmission of zinc in relation to X-ray diffraction on plexiglas, exploring the variation of transmission with wavelength. It covers the measurement of intensities Io, I₁, and I2, and the calculation of transmission coefficients T(1) and T(2). The lecture also delves into the Compton effect, which involves the variation of wavelength after diffusion. Numerical applications are provided using specific values for wavelength and intensity.

Official source

Related concepts (20)

Zinc

Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes.

Powder diffraction

Powder diffraction is a scientific technique using X-ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. An instrument dedicated to performing such powder measurements is called a powder diffractometer. Powder diffraction stands in contrast to single crystal diffraction techniques, which work best with a single, well-ordered crystal. Diffraction grating The most common type of powder diffraction is with x-rays, the focus of this article although some aspects of neutron powder diffraction are mentioned.

X-ray crystallography

X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of these diffracted beams, a crystallographer can produce a three-dimensional picture of the density of electrons within the crystal. From this electron density, the mean positions of the atoms in the crystal can be determined, as well as their chemical bonds, their crystallographic disorder, and various other information.

X-ray scattering techniques

X-ray scattering techniques are a family of non-destructive analytical techniques which reveal information about the crystal structure, chemical composition, and physical properties of materials and thin films. These techniques are based on observing the scattered intensity of an X-ray beam hitting a sample as a function of incident and scattered angle, polarization, and wavelength or energy.

Zinc chloride

Zinc chloride is the name of inorganic chemical compounds with the formula . It forms hydrates. Zinc chloride, anhydrous and its hydrates are colorless or white crystalline solids, and are highly soluble in water. Five hydrates of zinc chloride are known, as well as four forms of anhydrous zinc chloride. This salt is hygroscopic and even deliquescent. Zinc chloride finds wide application in textile processing, metallurgical fluxes, and chemical synthesis. No mineral with this chemical composition is known aside from the very rare mineral simonkolleite, .

Related lectures (36)

Exploring Synchrotron and XFEL Radiation: Applications and Techniques

Covers synchrotron and XFEL radiation, their applications, and experimental techniques across various scientific fields.

X-rays: From Discovery to Applications

Explores the historical perspective, properties, and applications of X-rays, including diffraction, atomic resolution, and spectral colors of elements.

Synchrotrons and X-ray Techniques

Explores Laue diffraction principles, applications, and modern techniques in materials science and time-resolved experiments.

X-ray Diffraction Applied to Cement MOOC: Cement Chemistry and Sustainable Cementitious Materials

Covers the basics of X-ray diffraction applied to cement and advanced data analysis techniques.

Crystal Structures: Miller Indices and Atom Arrangement