EXAFS Study on the Anharmonic Effective Pair Potential in Rutile Type, α-Quartz Type and Vitreous GeO2 Y. Yashiro, A. Yoshiasa, O. Kamishima, T. Tsuchiya, T. Yamanaka, T. Ishii and H. Maeda J. Phys. IV France, 7 C2 (1997) C2-1175-C2-1176 DOI: 10.1051/jp4:19972180