caa a22 4500 386400997 CHVBK 20180307112158.0 cr unu---uuuuu 161130e198909 xx s 000 0 eng 10.1017/S0885715600016596 doi S0885715600016596 pii (NATIONALLICENCE)cambridge-10.1017/S0885715600016596 Toraya H. Ceramic Engineering Research Laboratory, Nagoya Institute of Technology, Asahigaoka, Tajimi 507, Japan The Determination of Direction-Dependent Crystallite Size and Strain by X-Ray Whole-Powder-Pattern Fitting [Elektronische Daten] [H. Toraya] The procedure of whole-powder-pattern fitting without reference to a structural model has been applied to the determination of direction-dependent crystallite size and strain. The fitting function used is defined as the sum of (1) background intensity and (2) contributions from individual reflections given as the convolution of the observed instrumental function with the true data function in analytical form. Crystallite size and strain parameters are adjustable, together with unit-cell parameters and the integrated intensities of all reflections, during the whole-powder-pattern fitting. The procedure requires neither structural parameters nor intensity correction for preferred orientation in calculating profile intensity. The two models are incorporated for line broadening, one for isotropic size and strain effects and the other for the anisotropic size effect of cylindrical shape. The procedure has been tested for these two models using the observed data of 4 mole % Y2O3-doped tetragonal ZrO2 and hydroxyapatite, Ca5(PO4)3OH, respectively, and been shown to be effective for determining crystallite size and strain from the powder pattern with a relatively high peak density. Copyright © Cambridge University Press 1989 Powder Diffraction Cambridge University Press 4/3(1989-09), 130-136 0885-7156 4:3<130 1989 4 PDJ https://doi.org/10.1017/S0885715600016596 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0885715600016596 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Toraya H. Ceramic Engineering Research Laboratory, Nagoya Institute of Technology, Asahigaoka, Tajimi 507, Japan NATIONALLICENCE 773 0- Powder Diffraction Cambridge University Press 4/3(1989-09), 130-136 0885-7156 4:3<130 1989 4 PDJ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge