H8 N2 O13 P4 Si Durif A, Averbuch-Pouchot M, Guitel J Acta Crystallographica B32 (1976) 2957-2960 Structure cristalline de (N H4)2 Si P4 O13: un nouvel exemple de silicium hexacoordine _cod_database_code 1007008 _database_code_amcsd 0009577 15.14 7.684 4.861 97.86 96.74 83.89 P-1 atom x y z Si1 .75896 .0618 .0439 P1 .85025 .2134 .6039 P2 .69218 .4094 .8195 P3 .78874 .6806 .1797 P4 .66334 .9138 .4800 O1 .9367 .2872 .6948 O2 .8281 .0764 .7814 O3 .8445 .1365 .2960 O4 .7704 .3706 .6272 O5 .6032 .4221 .6638 O6 .7093 .2806 .0342 O7 .7076 .6003 .9791 O8 .8654 .5528 .2301 O9 .8076 .8417 .0537 O10 .7414 .7522 .4523 O11 .5748 .8509 .3834 O12 .6894 .0485 .3060 O13 .6721 .9846 .7892 N1 .4940 .7438 .8266 N2 .0322 .3140 .2310