Sphaerobertrandite
Pekov I V, Chukanov N V, Larsen A O, Merlino S, Pasero M, Pushcharovsky D Y,
Ivaldi G, Zadov A E, Grishin V G, Asheim A, Tafto J, Chistyakova N I
European Journal of Mineralogy 15 (2003) 157-166
Sphaerobertrandite, Be3SiO4(OH)2: new data, crystal structure and genesis
_database_code_amcsd 0006960
5.082 4.640 17.696 90 106.13 90 P2_1/c
atom     x     y     z  Uiso
Be1   .290  .416 .1198  .006
Be2   .629  .089 .9604  .007
Be3   .110  .917 .2924  .006
Si   .0274 .4195 .3755 .0073
O1    .023  .574 .1430  .008
O2    .045  .571 .2933  .008
O3    .228  .069 .0990  .001
O4    .697  .974 .0540  .008
OH5   .307  .575 .0413  .011
OH6   .557  .465 .1939  .013