Hey Sonia Ramdani

Here are a few workarounds you might try while you don't have access to PDF2 and PDF5, nor have had the files shared with you by someone.

This paper has both structures you're looking for. There's a very high chance they have the crystallographic data since they performed some DFT calc. Also, as they describe how each crystal should be, you might wanna try constructing the unit cell yourself. Another possibility is to contact the authors requesting the POSCAR files they used (this has worked for me quiet a few times). It's been more than a decade, but I've seen it work before.

DOI 10.1088/0953-8984/25/29/295502

Best,

Gabriel Vinicius

Hi Gabriel Vinicius

Thank you for answering my question. I will read the paper carefully and I will try to constructing the unit cell, I don't have another solution.

Best,

Sonia

Article Structural properties of defective (CH3NH3)2Cu(Cl1–xBrx)4 compounds

Eduardo Sanchez, thank you.