What is the name of #P_4O_6# ?
I first went with phosphorus trioxide, as that is what I knew it as...
Please see wikipedia for more details.
A more accurate and up-to-date name is: Tetraphosphorus hexaoxide
Even though there is a review for the steps in determining the name of binary molecular compounds like
The correct name is: Tetraphosphorus hexaoxide
This is confirmed by the entry in the PubChem - which is run by the US National Library of Medicine, the ChEBI Ontology, and ChemSpider (Royal Society of Chemistry), none of which show an entry for Tetraphosphorus hexoxide.
This is an image of the molecular structure of this compound.