Structure determination from powder data using anomalous scattering: difference and partial, Patterson densities, and phases of structure factors
1997 ◽
Vol 212
(7)
◽
Keyword(s):
X Ray
◽
AbstractFor structure determination from X-ray powder data, anomalous (resonant) scattering can be used to obtain difference Patterson and partial Patterson densities as well as phases of structure factors. Usually tuneable synchrotron radiation is used, and two or more powder patterns near and far the absorption edge of an atom type contained in the crystal are recorded.The algebraic theory together with some novel and efficient approximations is given in detail. Also symmetry restrictions, experimental and scaling procedures, and the use of the Maximum-Entropy method (MEM) are discussed. The application to the structure of an iron garnet FeFrom an MEM calculation of the electron-density, using the signed structure factors
1990 ◽
Vol 23
(6)
◽
pp. 526-534
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2001 ◽
Vol 57
(4)
◽
pp. 420-428
◽
Keyword(s):
1991 ◽
Vol 35
(A)
◽
pp. 77-83
◽
2014 ◽
Vol 70
(a1)
◽
pp. C105-C105