How to write the formula for calcium nitride?

Calcium nitride, referred to as calcium azanidylidenecalcium in IUPAC nomenclature, is an inorganic compound with constituent elements calcium and nitrogen and represented by the chemical formula Ca3N2. Ca3N2 can be used for obtaining reactive nitride ions

It can be synthesized when calcium is heated at an elevated temperature in the presence of air, which is represented by the following direct reaction of the elements [2]:

3Ca + N2 → Ca3N2

Ammonia gas is produced when calcium nitride (Ca3N2) is hydrolyzed by water.
Ca3N2 + 6H2O → 3Ca(OH)2 + 2NH3

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