Assertion: mineral's silicon | /r/AtLocation | four-fold coordination
Facets:
value: in all minerals
type: LOCATION
value: as a general rule
type: MANNER
Source sentences:
text: Silicon, as a general rule, is in four-fold coordination in all minerals; an exception is a case like stishovite (SiO 2 , an ultra-high pressure quartz polymorph with rutile structure).