Optimizing Lattice Parameter (a) for Energy Efficiency and Temperature Control

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new_986
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Hi...
The variation of the total energy with increasing the lattice constant (a), the minimum value of the lattice constant correspond to what degree of temperature?

Nawzad A.
 

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This seems like a HW question. How does one relate energy to a characteristic temperature in general? Think thermodynamics or statistical mechanics.
 

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