| Other carbonates, i.e., ankerite, siderite, witherite, strontianite, may form if the respective metal cations are available. |
| Thus, the competition between monovalent and divalent cations acts only on the DNA sites and does not act on the mica sites. |
| In other cases the binding of impurity cations on to the resin will enable a purer zeolitic product to be obtained. |
| Non-metals accept electrons in forming anions while metals donate electrons to form cations. |
| The channel is impermeable to anions but is permeable to a diverse group of cations. |
| In an ionic compound there are two different types of ions present, the positively charged cations and the negatively charged anions. |
