In a manner relating to or exhibiting allotropy, which is when an element exists in multiple different physical forms.
From allotropic (relating to allotropy) plus -ally suffix. Allotropic comes from Greek 'allo-' (other) and 'tropos' (turning/form), literally meaning 'turning other ways.' The term was coined in the 1840s to describe elements like carbon that appear in different forms.
Diamond and graphite are allotropically different forms of the same element—carbon—yet they have completely opposite properties: one is the hardest natural material and clear, while the other is soft and black and conducts electricity. It's wild that the same atoms just need to be arranged differently to become totally different substances!
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