%0 Journal Article %T X-Ray Profile Refinement of La2Cu04 %J Iranian Journal of Crystallography and Mineralogy %V 3 %N 2 %U http://ijcm.ir/article-1-913-en.html %R %D 1995 %K Rietveld method, SlruCl/lre rejiflemem, crystal SfmClllre, %X Thl.: Ri elwc ld mc thod ofstructurl.: refinement from powder dilTr<:lction patterns is widely used with neutron data and int:reasingly so with x* ray data . [n this p<:lper the Ril.:tveld method has hccn cxplainl.:d. As an ex.ample the t: rystal :-.truclure of LazCu04 at rollm It:mperaturc has been refined using x*ray powder dirfr<:lctiol1 data. The crystal ,lruc lure is llflhorombi c wilh a = 5.154S(4)A . h = 5.411116(1)A . c = 13.1529 (9)A. and space gfllUp em,"' A sample of La2Cu04 has been oxidized to La2Cu04+0 and its magnetic susceptibily as a function or temperature has heen studied. The new m(ltcrial is supcrconductor with Tc == 30K. Further investigation is in progress to determine the va lue or () and the position of the extra oxygen atOl11s in tht..: cell. %> http://ijcm.ir/article-1-913-en.pdf %P 123-136 %& 123 %! %9 Research %L A-10-44-180 %+ %G eng %@ 1726-3689 %[ 1995