Ilvaite Carrozzini B European Journal of Mineralogy 6 (1994) 465-479 Crystal structure refinements of ilvaite: new relationships between chemical composition and crystallographic parameters Sample: Cinco Villas X-2 _database_code_amcsd 0006537 13.006 8.808 5.858 90 90.31 90 P2_1/a atom x y z occ Biso Ca .81287 .37026 .75330 .60 FeM(1,1) .89018 .04952 .00719 .98 .54 MgM(1,1) .89018 .04952 .00719 .02 .54 FeM(1,2) .89003 .05202 .49290 .91 .52 AlM(1,2) .89003 .05202 .49290 .09 .52 FeM2 .94077 .74012 .24857 .90 .55 MnM2 .94077 .74012 .24857 .10 .55 Si1 .95951 .36858 .24920 .38 Si2 .67950 .22718 .25221 .39 O1 .00997 .02960 .73627 .74 O(2,1) .93719 .27247 .01617 .59 O(2,2) .93539 .27243 .48228 .56 O3 .77758 .10909 .25666 .56 O(4,1) .67137 .32746 .01901 .61 O(4,2) .67059 .33169 .48166 .57 O5 .58489 .10060 .25347 .53 O6 .60186 .02562 .75206 .74 O7 .79826 .10932 .74367 .56 H .74387 .07248 .74665 3.53