Assertion: antimony | /r/AtLocation | two allotropic forms
Facets:
Source sentences:
text: Antimony exists in two allotropic forms (see allotropy ); the more common is silvery blue-white and has a rhombohedral crystalline structure.
text: Antimony exists in many allotropic forms (physically distinct conditions that result from different arrangements of the same atoms in molecules or crystals).
text: Antimony is an element that is metallic and can be found in four allotropic forms.