There is no chemical compound called "nitrade". It's likely a misspelling of "nitride".

Nitrides are compounds formed by the reaction of nitrogen with other elements. They are typically ionic compounds with a high melting point.

The formula for a nitride depends on the element it's combined with. For example:

* Lithium nitride: Li₃N

* Magnesium nitride: Mg₃N₂

* Aluminium nitride: AlN

If you can provide more context about what you're looking for, I can help you determine the specific nitride you're interested in.