Assertion: zircon | /r/HasAspect | about 1–4% of the zr
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: It does not exist as a free element on Earth, but is found combined in solid solution with zirconium in natural zirconium compounds such as zircon, ZrSiO 4 , which usually has about 1–4% of the Zr replaced by Hf.
text: It does not exist as a free element on Earth, but is found combined in solid solution with zirconium in natural zirconium compounds such as zircon, ZrSiO 4 , which usually has about 1–4% of the Zr replaced by Hf.