According to literature MnTe has hexagonal NiAs type crystal structure. Can anyone please provide me the crystallographic information file (CIF) of MnTe?
Mohammed has given you a link to one of the hexagonal phases of MnTe (P63/mmc, space group #194), the one you asked for. If you are also interested in the other hexagonal phase (P63mc, #186), as well as the cubic (Fm-3m, #225) and orthorhombic (Pnma, #62) phases), they are also available in the COD database.
I have compiled all the available reported structures on MnTe in the COD and ICSD databases for you in the attached document. Note that many structures are only available in one of the databases. Also, I have downloaded a representative structure for each of the space groups I mentioned earlier, and I am attaching those as well. I hope this helps.