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sulfur nitride

n. 1 (context chemistry English) a simple binary compound of sulfur and nitrogen, S4N4, having a ring structure; it is explosive 2 (context chemistry English) an inorganic polymer, [SN]n, that has metallic properties

Wikipedia
Sulfur nitride

Sulfur nitride may refer to a number of sulfur nitrogen compounds:

Additionally, some unstable species are known: