In addition to sulfate and selenate, the divalent anion can be chromate (CrO42−), tetrafluoroberyllate (BeF42−), hydrogenphosphate (HPO42−) or monofluorophosphate (PO3F2−).
Selain sulfat dan selenat, anion divalen dapat menjadi chromate (CrO42−), tetrafluoroberyllate (BeF42−), hidrogenfosfat (HPO42−) atau monofluorofosfat (PO3F2−).