Assertion: potassium nitrate | /r/HasProperty | found as massive encrustations
Facets:
value: on cavern walls
type: LOCATION
value: on ceilings
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: It usually is found as massive encrustations and efflorescent growths on cavern walls and ceilings where solutions containing alkali potassium and nitrate seep into the openings.