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Cell Parameters

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The cell parameter for each data set was calculated by taking an average of the values recorded from reflections 3 to 11. The lowest angle reflections were excluded because of the scatter of values clearly shown on the earlier plots. Data sets 2,5 and 8 were excluded from an average cell parameter of 58.359 - which is very close to the value (58.362) from data on a powder sample. By taking the cell parameter of 58.359 it was possible to calculate the theoretical d spacings for this thin film specimen. Data set 3b is closest to the average cell parameter and data sets close to this show small angular displacement errors.