Delhayelite Cannillo E, Rossi G, Ungaretti L Rendiconti della Societa Italiana di Mineralogia e Petrologia 26 (1970) 63-75 The crystal structure of delhayelite _database_code_amcsd 0015364 24.86 7.07 6.53 90 90 90 *Pmmn -.25 -.25 0 atom x y z occ Biso K1 .1322 .25 .7804 .88 1.95 K2 .25 .25 .3721 .9 2.76 K3 .25 .75 .0195 .85 4.45 Na 0 0 0 .75 1.07 CaNa 0 0 0 .25 1.07 Ca .0067 .75 .5034 .81 Al1 .1828 .75 .5342 .5 .59 Si1 .1125 .4656 .2818 .51 Si2 .1828 .75 .5342 .5 .59 Si3 .1065 .75 .9188 .70 O1 .0550 .4818 .3845 3.76 O2 .1618 .5510 .4135 4.01 O3 .1124 .5675 .0601 3.28 O4 .0491 .75 .8164 1.64 O5 .1580 .75 .7738 2.73 O6 .1295 .25 .2433 2.96 O7 .25 .75 .5392 2.32 Cl .25 .25 .8793 .9 3.83 F .0297 .25 .8146 2.02