Assertion: β quartz | /r/CapableOf | melt at 1550°c
Facets:
value: directly
type: MANNER
value: without transformation
type: MANNER
value: into β-tridymite
type: OTHER
Source sentences:
text: If one heats up a quartz crystal very quickly, it will still undergo a phase transition to β-quartz, but the β-quartz will then "skip" the transition to β-cristobalite and directly melt at a much lower temperature, at 1550°C.
text: This is what happens when β-quartz directly melts at 1550°C without transformation into β-tridymite, and what happens if β-tridymite and β-cristobalite get cooled very quickly.