Assertion: plutonium's phase | /r/HasProperty | many different metallic
Facets:
Source sentences:
text: Casting and then machining plutonium is difficult not only because of its toxicity, but because plutonium has many different metallic phases, also known as allotropes.
text: Casting and then machining plutonium is difficult not only because of its toxicity, but also because plutonium has many different metallic phases.