Hey there Santosh Arade! Well, diving into the world of ferrites, my friend, you Santosh Arade can snag a CIF file for that specific Cu0.5Ni0.5Fe2O4 sample by checking out databases like the Crystallography Open Database (COD: https://www.crystallography.net/cod/) or the Inorganic Crystal Structure Database (ICSD: https://icsd.products.fiz-karlsruhe.de/). Those places are treasure troves for crystallographic data. There may be other internet resources.
Now, you Santosh Arade might even try sweet-talking a researcher who's already worked on similar materials. They could probably shoot you a copy of the CIF file with a wink and a smile. Always an smart choice.
Cross-referencing can be another way of getting CIF. Once you locate the CIF file, you Santosh Arade can use software like Jmol or Mercury to visualize and manipulate the crystal structure. Remember, in the world of materials science, precision is your best friend. Good luck with your research!
Happy crystal hunting! If you Santosh Arade need more, just give me a shout. I got your back.