Crystals have long been admired for their regularity and symmetry, but they were not investigated scientifically until the 17th century by Johannes Kepler. X-rays range in wavelength from 10 to 0.01 nanometers; a typical wavelength used for crystallography is 1 Å, which is on the scale of covalent chemical bonds and the radius of a single atom. Therefore, X-rays are the "sweet spot" for wavelength when determining atomic-resolution structures from the scattering of electromagnetic radiation. The most precise method of X-ray crystallography is single-crystal X-ray diffraction, in which a beam of X-rays strikes a single crystal, producing scattered beams. When they land on a piece of film or other detector, these beams make a diffraction pattern of spots; the strengths and angles of these beams are recorded as the crystal is gradually rotated. X-ray diffraction data can determine the mean chemical bond lengths and angles to within a few thousandths of an Angstrom and to within a few tenths of a degree, respectively.Data are combined computationally with complementary chemical information to produce and refine a model of the arrangement of atoms within the crystal.
|Author||Mahesh K. Patel,Kinjal D. Patel and U. H. Patel|
|Number of Pages||136|
|Country of Manufacture||India|
|Product Brand||LAP LAMBERT Academic Publishing|
|Product Packaging Info||Box|
|In The Box||1 Piece|
|Product First Available On ClickOnCare.com||2015-10-08 00:00:00|