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Transcript of Crystal Structure
The chemical laboratories of the Swiss Federal Institute of Technology (ETH) decided to create their own chemical crystallography group under the leadership of Jack D. Dunitz. Crystal Structure By: Kiersten Hargett and Hydeia Harvey What is a crystal structure? IN OTHER WORDS...
A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice. Mineralogy- a subset of geology (study of Earth) specializing in the scientific study of chemistry, crystal structure, and physical properties of minerals.
Crystallography - the science that examines the arrangement of atoms in solids
Lattice - A periodic configuration of points or particles throughout an area or space, especially with the arrangement of ions or molecules in a crystalline solid.
Monograph - specialist work of writing
on a single subject or an aspect of a
Feldspars - group of rock-forming minerals which make up as much as 60% of the Earth's crust WORKS CITED:
http://en.wikipedia.org/wiki/X-ray_crystallography Crystal Structure Vocabulary (In Order of Appearance) Crystal Structure Timeline 1856 1959 1920 Crystallography research begin in the country of Zürich under the scientist Gustav Adolph Kenngott. Paul Niggli succeeded G.A. Kenngott with further research in crystallography. Niggli's famous monograph "Geometric Crystallography of Discontinuum" was a fundamental contribution to structural crystallography. Under the leadership of Fritz Laves, the Institute of Crystallography and Petrography took focus on research activities such as, crystallography of feldspars and metals, and their real structures in contrast to the idealized perfect crystal structure description. 1997 With the appointment of Albert M. Kunz, assistant professor for high-pressure crystallography, a strong link to Earth Sciences was established. Crystal Structure Facts X-Ray Use in Crystallography X-ray crystallography
method of determining the atomic and molecular structure of a crystal, in which the crystalline atoms cause a beam of X-rays to diffract into many specific directions
Measuring the angles and intensities of these diffracted beams helps a crystallographer produce a 3D picture of the density of electrons within the crystal.
The electron density determines chemical bonds and their disorders X-Ray Crystallography Cont'd Chief method for characterizing the atomic structure of new materials and in discerning materials that appear similar by other experimentsX-ray crystal structures can also account for unusual electronic or elastic properties of a material, shed light on chemical interactions and processes, or serve as the basis for designing pharmaceuticals against diseases. X-Ray Crystallography Cont'd...
Since many materials can form crystals (salts, metals, minerals, semiconductors, as well as various inorganic, organic and biological molecules) X-ray crystallography has been fundamental in the development of many scientific fields.
Method revealed the structure and function of many biological molecules, including vitamins, drugs, proteins and nucleic acids such as DNA.