I have a graphene MgO material and I want to see structure of graphene MgO. It means where is the MgO attaching to graphene sheet, I am using the Diamond software for structure analysis.
A person who identified this structure can provide you the cif file. Or you can find it in a database. As a last option, you obtain your sample and get its XRD. You can find your cif file after an expert work on your pattern. The program FullProf can help you in order to do this.
You might want to look it up in the International Crystal Structure Database (ICSD), for example, here:
https://icsd.fiz-karlsruhe.de/search/basic.xhtml
there is no option for direct retrieval of .cif files, but you can have .xyz file, and then convert it into the .cif if you need (however, most of the crystallography software would read the .xyz files as well)
First you check whether the structure of your material is reported or not. If it is reported than take the cif from data base and use in your refinement process. My opinion is that your material is not crystalline, its a composite type of structure, so use the wyckoff position of graphene from its crystal structure cif. After that, check its parameters with the pure graphene, you will realized that there are some stretched or compression kind of stage occur in material.