# Exercise 2.1-3

# Calculate Formation Entropies

| Calculate the formation entropy for a simple cubic crystal.
|  | Assume that there are two kinds of springs holding the atoms together: Springs between next neighbors, and springs between second next neighbors.
|  | Look at the resonance frequency as a function of the spring constant D (make some assumptions about the spring constant D2 of the second-next-neighbor spring in terms of the spring constant D1 of the next neighbors).
| Calculate the formation entropy first by only considering the D1 springs; than consider the D2 springs, too.
| Link to the Solution

With frame

2.1.1 Simple Vacancies and Interstitials

Solution to Exercise: Calculate the Formation Entropy

© H. Föll (Defects - Script)