First, is there a general relationship between vacancies and CTE. For a material with a positive CTE, will increasing Shottky defects increase CTE?

Second, I have 4 different samples of Prussian Blue NaFe[Fe(CN)6], and I suspect they have varying [Fe(CN)6] anion vacancies from 0 - 25%, probably balanced by Na+ cation vacancies or change in the other Fe valance. I had an idea that I could quickly show qualitatively that my samples had increasing vacancy concentration by finding CTE via dilatometry. Do you think that would be compelling evidence if it was possible?

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