Assertion: cristobalite | /r/HasProperty | a polymorph of quartz
Facets:
Source sentences:
text: Cristobalite is a polymorph of quartz and a temperature exceeding 900°C is required for this crystal conversion (Cotton and Wilkinson 1988; Clark and Peakor 1992; Moore 1999).
text: Cristobalite is a polymorph of quartz, meaning that it is composed of the same chemistry, SiO 2 , but has a different structure.