Editing Phosphorus (section)

====Oxides and sulfides====
{{main|phosphorus oxides|phosphorus sulfides}}
[[File:Phosphorus-pentoxide-3D-balls.png|thumb|right|The tetrahedral structure of {{chem2|P4O10}} and {{chem2|P4S10}}]]
[[Phosphorus pentoxide]] ({{chem2|P4O10}}) is the [[acid anhydride]] of phosphoric acid, but several intermediates between the two are known. This waxy white solid reacts vigorously with water. Similarly, [[phosphorus trioxide]] ({{chem2|P4O6}}, also called tetraphosphorus hexoxide) is the anhydride of {{chem2|P(OH)3}}, the minor tautomer of phosphorous acid. The structure of {{chem2|P4O6}} is like that of {{chem2|P4O10}} without the terminal oxide groups. Mixed oxyhalides and oxyhydrides of phosphorus(III) are almost unknown. Meanwhile, phosphorus forms a wide range of sulfides, where the phosphorus can be in P(V), P(III) or other oxidation states. However, only two of them are commercially significant. [[Phosphorus pentasulfide]] ({{chem2|P4S10}}) has a structure analogous to {{chem2|P4O10}}, and is used in the manufacture of additives and pesticides.{{r|Heal1980}} The three-fold symmetric [[Phosphorus sesquisulfide]] ({{chem2|P4S3}}) is used in [[strike-anywhere match]]es.