| This qualifier is the general description for the common allotropes of elemental phosphorus. |
| The plutonium pits of nuclear weapons employ an alloy with gallium to stabilize the allotropes of plutonium. |
| Each of these allotropes of phosphorous also has its own subset of forms. |
| Arsenic has two allotropes, yellow arsenic and metallic arsenic, which is brittle. |
| The element normally exhibits six allotropes and four oxidation states. |
| Two allotropes of the element exist, accounting for the slight variation in densities. |
