Assertion: w silica | /r/CapableOf | involve sio 4 tetrahedra
Facets:
Source sentences:
text: W-silica is an unstable low-density form involving {SiO 4 } tetrahedra sharing opposite edges instead of corners, forming parallel chains similarly to silicon disulfide (SiS 2 ) and silicon diselenide (SiSe 2 ):