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 = 295 K _database_code_amcsd 0001603 9.208 9.208 9.197 90 90 120 P6/mcc atom x y z occ Biso Si .3889 .1182 0 0.29 Be .5 0 .25 .894 0.46 Li .5 0 .25 .106 0.46 Al 2/3 1/3 .25 0.33 O1 .3062 .2351 0 0.85 O2 .49842 .14681 .14499 0.71 OW 0 0 .25 .61 3.6 Cs 0 0 .25 .083 3.6 Na 0 0 0 .24 2.1 H .072 .090 .318 .105 4.0