Assertion: silicon's form | /r/HasProperty | poly-crystalline
Facets:
Source sentences:
text: Pure semiconductor silicon is produced in two forms: poly-crystalline (by the reduction of SiCI 4 or SiHCI 3 with zinc or hydrogen or by the thermal decomposition of SiI 4 and SiH 4 ) and single crystals (by floating zone refining and by “withdrawing” a single crystal from molten silicon—the Czohralski method).