P. Azavant et al., A QUANTUM-CHEMICAL METHOD FOR THE CALCULATION OF DYNAMIC STRUCTURE FACTORS - APPLICATIONS TO SILICON, MAGNESIUM-OXIDE AND BERYLLIUM-OXIDE, Theoretica Chimica Acta, 89(4), 1994, pp. 213-226
The static structure factors of periodic systems have been deduced fro
m ab initio Hartree-Fock calculations. Taking into account atomic ther
mal motions, dynamic structure factors at 298 K were then calculated b
y assuming that atomic displacements are independent and atomic orbita
ls follow nuclear movements. Th ree triperiodic systems have been stud
ied: silicon, magnesium oxide and beryllium oxide.