Beryl Artioli G, Rinaldi R, Stahl K, Zanazzi P F American Mineralogist 78 (1993) 762-768 Structure refinements of beryl by single-crystal neutron and X-ray diffraction Sample no. 1, morganite, probed with neutrons, T = 30 K _database_code_amcsd 0001602 9.197 9.197 9.202 90 90 120 P6/mcc atom x y z occ Biso Si .3895 .1182 0 0.34 Be .5 0 .25 .888 0.33 Li .5 0 .25 .105 0.33 Al 2/3 1/3 .25 0.26 O1 .3065 .2357 0 0.65 O2 .4988 .1468 .1449 0.62 OW 0 0 .25 .72 2.0 Cs 0 0 .25 .083 2.0 Na 0 0 0 .24 1.5 H .092 .062 .316 .123 5.0