Assertion: boron | /r/HasProperty | difficult
Facets:
value: to synthesize boron
type: PURPOSE
value: extremely
type: DEGREE
value: because of the corrosiveness of the liquid
type: CAUSE
value: because of its high melting point
type: CAUSE
Source sentences:
text: It is extremely difficult to prepare pure boron because of its high melting point and the corrosiveness of the liquid.
text: Boron is not much studied because it is extremely difficult to synthesize boron in the laboratory.