SEARCH Articles Figures Tables Chalcogen Chalcogen elements Chalcogen-containing Chalcogen-nitrogen rings Chalcogen-nitrogen-phosphorus rings Chalcogens Chalcogens rings Contain Nitrogen Containers nitrogen Nitrogen element Nitrogen elemental Nitrogen-containing Nitrogen-phosphorus rings P element P ring P-block elements PS block Phosphorus P Phosphorus containing Phosphorus element Phosphorus rings Phosphorus, III Phosphorus, elemental Phosphorus-containing Rings Rings containing Nitrogen