hcp lattice command

i am going to make a hcp lattice by its constants,a=2.95 & c=4.68.
please tell me how can i make this lattice?
my lattice is orthogonal so is 2.95 my scale?

thank you very much
sasan nouri

Use a custom lattice with 4 basis atoms. The hcp lattice defined
by LAMMPS does not allow you to set the c/a ratio. See the
doc page for details.