Mg⁺²₃P⁻³₂;
K⁺₂Cr⁺⁶₂O⁻²₇;
H⁺₂Fe⁺⁶O⁻²₄;
Ca⁺²(N⁺⁵O⁻²₃)₂.
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Mg⁺²₃P⁻³₂;
K⁺₂Cr⁺⁶₂O⁻²₇;
H⁺₂Fe⁺⁶O⁻²₄;
Ca⁺²(N⁺⁵O⁻²₃)₂.