= Frederick Lindemann, 1st Viscount Cherwell
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= Frederick Lindemann
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<Frederick Lindemann> related characteristic atomic <oscillations> to <heat capacity> and <melting>. His 1910 treatment estimated molecular <eigenfrequencies> and compared them with <frequencies> inferred from thermal and optical observations. The associated <Lindemann melting criterion> treats sufficiently large thermal atomic displacements relative to atomic spacing as a sign that a <crystal> becomes unstable. It is an approximate physical model: comparisons between independently inferred <frequencies> test the model, while a universal exact displacement threshold is not implied.<Über die Berechnung molekularer Eigenfrequenzen by Frederick Lindemann>[1910 original German paper, pp. 609–612, melting-point and eigenfrequency tables and heat-capacity comparison]{ref}
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{title=Portrait of <Frederick Lindemann, 1st Viscount Cherwell>}
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