4

O      -0.023355873324547      0.241229004970342      0.022012931688855
O       1.316343479303719      1.425342409524768     -0.014337243893452
Be      1.314431065450862      0.043761705930754      1.220515293547215
Be      0.192739903185316      1.360551359913648      1.146091407922689