Assertion: antimony's form | /r/HasProperty | stable
Facets:
value: below 570°c of temperature
type: OTHER
Source sentences:
text: There are four allotropic forms of antimony three metastable forms: yellow, black and explosive, and one metallic form that is stable.
text: The latter form is stable below 570°C of temperature.
text: At 100 °C, it gradually transforms into the stable form.