Muối \(R{\left( {{\rm{N}}{{\rm{O}}_3}} \right)_2}(s)\) | \({\rm{Mg}}{\left( {{\rm{N}}{{\rm{O}}_3}} \right)_2}\) | \({\rm{Ca}}{\left( {{\rm{N}}{{\rm{O}}_3}} \right)_2}\) | \({\rm{Sr}}{\left( {{\rm{N}}{{\rm{O}}_3}} \right)_2}\) | \({\rm{Ba}}{\left( {{\rm{N}}{{\rm{O}}_3}} \right)_2}\) |