Oxygen

• Up: Chemical element

Oxides

(TODO: discuss major ones here)

Carbon group / group IV / group 14 oxides

• CO₂ normally the well known gas but highly explosive when in solid sp3 form (analog to quartz)
• SiO₂ quartz and its various known polymorphs (~Mohs 7)
• GeO₂ argutite Mohs 6-7 -- germanium is a rather rare element!
• SnO₂ cassierite Mohs 6-7
• PbO₂ [1] -- alpha-PbO₂ scrutinyite -- beta-PbO₂ plattnerite (TODO: find out Mohs hardness of PbO₂ minerals)

(TODO: Here maybe some pseudo phase diagrams can be made.)

Related

• Salts of oxoacids
• Hydroxides
• Binary diamondoid compounds

External links

• Unstable oxygen chain polymers: Hydrogen polyoxides (Wikipedia)
• Maybe of relevance: Surface properties of transition metal oxides (Wikipedia)