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Table 1 Chemical properties of phosphorus and arsenic

From: Review of interactions between phosphorus and arsenic in soils from four case studies

  Stable oxidation states in environment Acidity constants Crystal radiusa
Phosphorus P5+ ([Ne]3s03p0) H3PO4: 10−2.15, 10−7.2, 10−12.35 Phosphate 31 pm
Arsenic As3+ ([Ar]3d104s24p0)
As5+ ([Ar]3d104s04p0)
H3AsO3: 10−9.2
H3AsO4: 10−2.19, 10−6.94, 10−11.5
Arsenate 47.5 pm
  1. a[112]