I used Powdercell to draw the ZnO_hexagonal crystal structure but when I finished entering the data, my O atom did not appear on the drawing, I checked the data table again, the O atom did not appear in the table.
I am not aware about powdercell software, but I can suggest you to use VESTA software which is an open source option to visualize the crystal structure. ZnO is very easy system, which crystal structure can be plotted easily. If you need any help just text me I will show you how to do it. Good luck.
Hello. There will be a mistake somewhere because I have no problem with that - see the picture. The program is graphically quite obsolete today, but it is still usable in teaching (Wyckoff positions, subgrupe and supergrupe transformations, etc.)