%0 Journal Article
%T ON THE LONG RANGE ORDER PARAMETERS OF CERTAIN A-15 TYPE COMPOUNDS<br>
%A ZHANG Hong Shanghai Institute of MetallurgyAcademia Sinica
%A <br>
%J 金属学报
%D 1985
%I 
%X A review using the structural factor F(S_(6c),y)was carried out for the longrange order parameters of certain A-15 type compounds composed of A_(1-y)B_y cal-culated previously by Van Routh et al.and by Wang et al.from X-ray data.Itwas found that the weight factors in objective functions for analysis and calcu-lation by them seem to be doubtful and the conclusion drawn therefrom aboutthe order-disorder states in these compounds should be reexamined.The criterionwith a minimum error on calculation of the long range order parameters may beproposed by comparison between the composition y from X-ray intensity analysisand y_0 from other accurate determination.Therefore,a neccessary condition maybe suggested for ascertaining the modified weight factors in objective functions,and then the long range order parameters,i.e.,y should be equal to or approxi-mate to y_0.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=DA491005C52246455340FA0129C4F232&yid=74E41645C164CD61&vid=659D3B06EBF534A7&iid=CA4FD0336C81A37A&sid=1371F55DA51B6E64&eid=D997634CFE9B6321&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1