Assertion: cristobalite | /r/HasProperty | murata
Facets:
Source sentences:
text: It may furthermore be found in cavities in volcanic rocks and in thermally metamorphosed sandstones (Deer et al. 1967) and may also be a transient stage in the diagenesis of diatomaceous shale with the result that soils made of these geologic formations may be rich in cristobalite (Murata and Nakata 1974).