Nyboite Raudsepp M, Turnock A C, Hawthorne F C American Mineralogist 72 (1987) 959-964 Characterization of cation ordering in synthetic scandium-fluor-eckermannite, indium-fluor-eckermannite, and scandium-fluor-nyboite by Rietveld structure refinement Sample: FScNY-A3 _database_code_amcsd 0001117 9.8425 18.157 5.3381 90 103.979 90 C2/m atom x y z occ Biso O1 .108 .0906 .210 .8 O2 .121 .1662 .728 .8 F3 .101 0 .710 .8 O4 .361 .2475 .788 .8 O5 .347 .1326 .085 1.1 O6 .343 .1194 .593 1.1 O7 .342 0 .300 1.2 Si1 .2842 .0838 .290 .75 .4 Al1 .2842 .0838 .290 .25 .4 Si2 .2926 .1679 .800 .4 Mg1 0 .0876 .5 .6 Mg2 0 .1801 0 .107 .6 Sc2 0 .1801 0 .893 .6 Mg3 0 0 0 .6 Na4 0 .2776 .5 .9 NaA .043 .5 .102 .5 2.3