Can ab initio crystal structure methods predict the structure of cuprates from their stoichiometry and quantify the brittleness of those materials?

Current ab initio methods may not be able to predict the electronic transport properties of cuprate superconductors but can they be used to predict their crystal structure? Furthermore those materials are typically polycrystalline and tend to brittle, can ab initio methods predict the details of those properties?

This dissertation (Esfahani, M.M.D., 2017. Novel Superconducting Phases of Materials under Pressure by Evolutionary Algorithm USPEX (Doctoral dissertation, State University of New York at Stony Brook)) seems useful.
Yes, indeed it's done by using plane-wave ultrasoft pseudo-potential technique and GGA exchange-correlation. See here: https://www.tandfonline.com/doi/pdf/10.1080/23311940.2016.1231361?needAccess=true . Particularly in this paper authors were able to calculate mechanical properties of Barium cuprate ($$\text{BaCuO}_{2}$$) superconductor and they find indeed it's brittle based on the definition of $$\frac{G}{B} > 0.5$$ where $$G$$ is shear modulus and $$B$$ is the bulk modulus both of them calculated from DFT.