F1.8 H1.376 O2.2 Si0.206 Zr Valero R, Paillaud J, Durand B, Guth J, Chopin T European Journal of Solid State and Inorganic Chemistry 35 (1998) 735-743 Rietveld refinement of two fluoro-hydroxy-zircons _cod_database_code 1004027 _database_code_amcsd 0012625 6.64821 6.64821 5.90758 90 90 90 *I4_1/amd 0 -.25 .125 atom x y z occ Zr1 0 .75 .125 Si1 0 .75 .625 .206 O1 0 .06306 .18865 .55 F1 0 .06306 .18865 .45