Assertion: osmium | /r/HasAspect | similar chemistry
Facets:
value: very
type: DEGREE
value: due to the lanthanide contraction
type: CAUSE
Source sentences:
text: Ruthenium and osmium have very similar chemistry due to the lanthanide contraction but iron shows some differences from them; for example, although ruthenium and osmium form stable tetroxides in which the metal is in the +8 oxidation state, iron does not.