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Concerning the experimental measurements, giving rise to an G level Alert, on the number of Friedel opposites.  What is important is not much that 50% of Friedel opposites have been measured but why 50% have NOT been measured.  What criterion was used to decide which pairs should be measured and which would not?
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Response: In our structure, there is atom(Ag) heavier than Si. As we known, the proportion of Friedel related reflections required decreases with the increasing atomic weight of the heaviest element. In our structure, although Fraction of Friedel pairs measured is 0.461<0.5, the Flack parameter 0.01(3) is enough to determine absolute structure of title compound.
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