Assertion: granular periclase | /r/HasProperty | ferrous spinel
Facets:
Source sentences:
text: granular periclase with total content of impurity oxides (CaO and SiO 2 ) no more than 4% base and dispersed periclase with a mass fraction of MgO and not less than 97% 15-30 aluminum is ferrous spinel, containing 1-7 wt. % TiO 2