Pb3Ga2Ge4O14 Belokoneva E L, Stefanovich S Y, Pisarevskii Y V, Mosunov A V Russian Journal of Inorganic Chemistry 45 (2000) 1642-1651 Refined structures of La3Ga5SiO14 and Pb3Ga2Ge4O14 and the crystal-chemical regularities in the structure and properties of compounds of the langasite family _database_code_amcsd 0015404 8.417 8.417 5.014 90 90 120 P321 atom x y z occ Biso Pb .4050 0 0 1.33 Ga1 0 0 0 .4 .55 GeGa1 0 0 0 .6 .55 Ge1 1/3 2/3 .5142 .67 Ga2 .7586 0 .5 .533 .57 Ge2 .7586 0 .5 .467 .57 O1 1/3 2/3 .172 1.9 O2 .456 .288 .342 1.7 O3 .210 .088 .771 .9