(NH4)2HCr3AsO13 Averbuch-Pouchot M Acta Crystallographica B34 (1978) 3350-3351 Structure du tris(chromato)arsenate de diammonium-hydrogene, (NH4)2HCr3AsO13: mise en evidence d'un nouvel anion (Cr3AsO13)^3-^ _cod_database_code 1008032 _database_code_amcsd 0015979 14.02 9.49 9.57 90 93.12 90 P2_1/c atom x y z N1 .3601 .1680 .4867 N2 .0386 .3066 .3096 As1 .31450 .78414 .04409 Cr1 .14424 .57111 .04849 Cr2 .48282 .56350 .71163 Cr3 .19377 .06337 .10580 O1 .3112 .6655 .3734 O2 .2742 .6173 .0459 O3 .4279 .7858 .1123 O4 .2452 .8860 .1397 O5 .1360 .4110 -.0059 O6 .0827 .8196 .4538 O7 .1099 .5787 .2046 O8 .4026 .4220 .2963 O9 .4538 .9257 .3710 O10 .4451 .0808 .1428 O11 .0800 .0568 .1156 O12 .2206 .3917 .4501 O13 .2406 .1735 .2163