Assertion: pyrite | /r/HasProperty | unstable
Facets:
value: in the natural environment
type: LOCATION
value: at earth's surface
type: LOCATION
Source sentences:
text: Iron pyrite is unstable at Earth's surface: iron pyrite exposed to atmospheric oxygen and water decomposes into iron oxides and sulfate.
text: Pyrite is unstable and undergoes slow oxidation, combining with water and atmospheric
text: Iron pyrite is unstable in the natural environment: in nature it is always being created or being destroyed.
text: Iron pyrite is unstable in the natural environment: in nature it is always in the process of being created or being destroyed.