Conclusions
Zero-point anharmonicity of interatomic potential between nearest neighbors in many solids can be determined by fitting ab initio calculations to EXAFS data
Anharmonicity of interatomic potential between nearest neighbors in copper is consistent with theoretical predictions
Temperature dependence of radial asymmetry parameter in solid iodine can be fit by a perturbed harmonic oscillator model
Zero-point anharmonicity of interatomic potential between nearest neighbors in iodine is very large