Assertion: silica | /r/HasProperty | aluminium oxide
Facets:
Source sentences:
text: Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO 2 ) (both amorphous and crystalline), aluminium oxide (Al 2 O 3 ) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata.