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the relative accuracy of the method of Scherrer to determine the crystal size is not better than 10% or so. Consequently, values derived from this technique cannot be presented with more than two significant digits. The values given must be rounded off. Generally, it must be made sure that only significant digits in all  are given. I must admit that I doubt the significance of all decimal places of the numbers given in the table.
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cannot be presented with more than two significant digits
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