Many ionic compounds contain polyatomic ions as the cation, the anion, or both. Polyatomic ions are a group of bonded atoms that act as discrete units, carrying an overall charge. As with simple ionic compounds, these compounds must also be electrically neutral, so their formulas can be ...
In addition, Loewenstein’s rule is respected, and local compensation of charges occurs by polyatomic arrangements involving Al and K atoms in well-defined configurations at the medium-range scale [4]. However, a model that only considers Loewenstein’s rule to explain the order–disorder of ...