Assertion: graphite's form | /r/HasProperty | converted to the beta form
Facets:
value: through mechanical treatment
type: CAUSE
Source sentences:
text: The alpha form can be converted to the beta form through mechanical treatment and the beta form reverts to the alpha form when it is heated above 1300 °C.
text: The alpha form can be converted to the beta form through mechanical treatment, and the beta form reverts to the alpha form when it is heated above 1300°C .