Assertion: gypsum | /r/HasProperty | heated in air
Facets:
Source sentences:
text: When gypsum is heated in air it loses water and converts first to calcium sulfate hemihydrate, (bassanite, often simply called "plaster")
text: When gypsum is heated in air it loses water and converts first to calcium sulfate hemihydrate, (bassanite, often simply called " plaster ") and, if heated further, to anhydrous calcium sulfate (anhydrite).