Na7Fe3(As2O7)4 Masquelier C, d'Yvoire F, Rodier N Acta Crystallographica C46 (1990) 1584-1587 Structure of the sodium ion conductor Na7Fe3(As2O7)4 _database_code_amcsd 0010172 9.940 8.5483 28.762 90 93.683 90 C2/c atom x y z occ Biso As1 .29984 .29537 .24664 .664 As2 .21985 .16184 .33893 .654 As3 .51105 .66258 .44285 .512 As4 .41229 .79584 .53617 .475 Fe1 0 .1202 .25 .58 Fe2 .31751 .9771 .43648 .53 Na1 .2783 .3808 .4457 1.60 Na2 .5211 .3577 .3561 .88 2.80 Na2' .475 .384 .3447 .16 2.0 Na3 .5 .0168 .25 .6 2.9 Na3' .525 .961 .3094 .2 2.4 Na4 .2957 .6031 .3461 .63 3.9 Na4' .339 .719 .3510 .31 3.6 O1 .3742 .2214 .2019 1.28 O2 .3623 .4638 .2685 1.11 O3 .1313 .2994 .2385 .95 O4 .3294 .1598 .2926 .91 O5 .0632 .1199 .3172 1.16 O6 .2371 .3355 .3626 1.66 O7 .2751 .0041 .3690 1.25 O8 .4772 .8462 .4254 1.01 O9 .6768 .6382 .4532 .82 O10 .4353 .5292 .4100 1.01 O11 .4463 .6451 .4982 .89 O12 .3425 .9450 .5056 .79 O13 .5593 .8364 .5642 .96 O14 .3086 .7141 .5722 .82