Ca(ClO4)2

Ca(+2)(Cl(+7)O(-2)4)2

O=Cl`|O|c|O`|-O^-# -0Ca^2+# -0O`^-# -Cl`|O|c|O`|=O

O//Cl<_qq4O><_pp4O>/O^-\0Ca^^++/0O`^-\Cl<_qq4O><_pp4O>\\O

O//Cl`|O|<_(A75,N2)O>_(A15)O^-/0Ca^2+\0O`^-_(A-15)Cl`|O|<_(A105,N2)O>\\O