Editing Silicon dioxide (section)

===Molecular SiO<sub>2</sub>===
The molecular SiO<sub>2</sub> has a linear structure like {{CO2}}. It has been produced by combining [[silicon monoxide]] (SiO) with oxygen in an [[argon]] matrix. 
The dimeric silicon dioxide, (SiO<sub>2</sub>)<sub>2</sub> has been obtained by reacting O<sub>2</sub> with matrix isolated dimeric silicon monoxide, (Si<sub>2</sub>O<sub>2</sub>). In dimeric silicon dioxide there are two oxygen atoms bridging between the silicon atoms with an Si–O–Si angle of 94° and bond length of 164.6 pm and the terminal Si–O bond length is 150.2 pm. The Si–O bond length is 148.3&nbsp;pm, which compares with the length of 161&nbsp;pm in α-quartz. The bond energy is estimated at 621.7 kJ/mol.<ref name="Jutzi">{{cite book|title=Silicon chemistry: from the atom to extended systems|vauthors=Jutzi P, Schubert U|publisher=Wiley-VCH|year=2003|isbn=9783527306473}}</ref>