(NH4)2(VO)(VP)O7 Boudin S, Grandin A, Labbe P, Raveau B Acta Crystallographica C52 (1996) 2668-2670 (NH4)2(VO)(VP)O7, a layered structure comprising tetrahedral VPO7 groups _cod_database_code 1001731 _database_code_amcsd 0010309 8.6233 8.6233 5.6384 90 90 90 P4bm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) P1 .36969 .13031 .06353 .51 .011 .011 .0068 -.004 .0000 .0000 V1 .36969 .13031 .06353 .49 .0076 .0076 .025 -.0004 -.0059 .0059 V2 0 0 .0593 .0108 .0108 .0183 0 0 0 O1 .5 .5 .3436 .030 .030 .023 0 0 0 O2 .3699 .1301 .3440 .0229 .0229 .020 .0038 .0003 -.0003 O3 .7019 .4169 -.0402 .0134 .031 .034 .0065 -.0008 -.0097 O4 .5 0 -.035 .059 .059 .017 -.016 0 0 N1 .1701 .3299 .585 .049 .049 .029 .026 .000 .000