Mise en evidence de tetraedres PN4 dans le nitrure Mg2PN3 de type wurtzite

Mg₂PN₃ has been prepared by reaction in solid state between Mg₃N₂ and P₃N₅. It crystallizes with orthorhombic symmetry, space group Pna2₁, with unit cell parameters a = 9.759 (5), b = 5.635 (3), $\text{c}\text{= 4.743 (3)}\text{A}\text{?}\text{z}\text{= 4}$. Its structure is related to the wurtzite type with Mg and P atoms ordered. It is the first example of PN₄ tetrahedra in a normal tetrahedral structure.