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Éó¸åÈ˵ÄÒâ¼û£º £¨Ö÷ÒªÊÇÕë¶Ô No. of parametersµÄÊýÄ¿£¬ÎÒ²»ÖªµÀÈçºÎÒÀ¾Ý¾§ÌåµÄ¶ÀÁ¢µ¥ÔªÖÐËùº¬µÄÔ×ÓÀ´Çó½â£¬ÁíÍ⻹ÓÐÄÇЩÏÞÖÆ¿ÉÒÔÔö¼ÓNo. of parametersµÄÊýÄ¿£¬»òÕßÌṩ½â¾öÎÊÌâµÄ;¾¶£¬ÔÚÄĶù¿ÉÒÔÕÒµ½ÏàʶµÄ´ð°¸£¬Ð»Ð»£¡ I had problems counting the variables. In the HT structure there are 9+3 non-H atoms on general positions and 2 (CL and O6) on special positions for (9+3)*9 + 2*5 = 118 variables. The total shown in the CIF is 121, of which one is the scale factor. What are the other two? |
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lywbq2008
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ÁíÍ⣬Éó¸åÈË»¹ÓÐÆäÓàÎÊÌ⣬²ËÄñÒ»Ö»£¬²»ÖªÈçºÎ»Ø´ð£¬¸Ðл¸÷λÌá³öÒâ¼û£¬Ð»Ð»£¡ The transmission factors differ substantially for the two structures (0.85-1.00 and 0.65-1.00)) even though the dimensions for the crystal(s) are the same and the linear absorption coefficients are nearly the same. Torsion angles are given with VERY large uncertainties [eg, 5.791(172) at line 81]. Uncertainties are usually limited to values no larger than 19. It is said that the phase transition is reversible. It is implied that the crystal remains single through the transition but that is never actually stated and no supporting evidence is given. The changes in the cell constants are large enough through the transition (ca 2% in the dimensions after correcting for the doubling of a and b; 1.9 deg in beta) that more information should be given. Re "The refined hydrogen proton": the H atom was not refined, the term "hydrogen proton" is redundant, and X-rays are not scattered by real protons, which have no electron density. |
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