{"success":true,"data":{"mp_id":"mp-1227415","type":"TRA","summary":{"formula":"Ca(Er2B15)2","mp_id":"mp-1227415","nelements":3,"is_stable":false,"nsites":35,"density":4.99766,"volume":343.3758,"a":4.09546,"b":4.09546,"c":20.47222,"alpha":90,"beta":90,"gamma":90,"space_group":"P4\/mmm","space_group_num":123,"crystal_system":"Tetragonal","formation_energy_per_atom":-0.42457,"energy_per_atom":-10.79973,"energy_above_hull":0.04904,"point_group":"4\/mmm","Bravais_Lattice":"tP","Bravais_Combination":"tP","packing_fraction":null,"uncorrected_energy_per_atom":-6.681534882285714,"volume_per_atom":9.81074,"c_over_a":4.99876,"b_over_a":1,"poisson_ratio":null,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":null,"g_vrh":null,"E_Calc(GPa)":null,"homogeneous_poisson":null,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":null,"Lame_Lambda(GPa)":null,"Pugh_Ratio(K\/G)":null,"Ductility":null,"bulk_modulus":null,"shear_modulus":null,"debye_temperature":null,"sound_velocity":null,"homogeneity":null},"electronic":{"is_metal":true,"band_gap":0,"is_gap_direct":false,"cbm":null},"magnetic":{"is_magnetic":false,"total_magnetization":0.00026,"ordering":"NM","num_magnetic_sites":0,"total_mag_norm_vol":0},"refs":{"mp_url":"https:\/\/materialsproject.org\/materials\/mp-1227415","mp_task_ids":["aaaeavjs"]}}}