Assertion: compound's formula | /r/HasProperty | mg
Facets:
value: fe
type: DEGREE
Source sentences:
text: For example, the olivine group is described by the variable formula (Mg, Fe) 2 SiO 4 , which is a solid solution of two end-member species, magnesium-rich forsterite and iron-rich fayalite, which are described by a fixed chemical formula.