Talk:Ammonium arsenate

Formula
There are three different ammonium phosphates:
 * Ammonium dihydrogenphosphate, [NH4][H2PO4]
 * Diammonium hydrogenphosphate, [NH4]2[HPO4]
 * Ammonium phosphate, [NH4]3[PO4]

I searched a database of crystallographic databases (CrystalWeb) and found the following ammonium arsenates:
 * Ammonium dihydrogenarsenate, [NH4][H2AsO4]
 * Diammonium hydrogenarsenate, [NH4]2[HAsO4]
 * Ammonium arsenate trihydrate, [NH4]3[AsO4].3H2O

Ben (talk) 11:01, 4 May 2010 (UTC)