{"success":true,"data":{"mp_id":"mp-637","type":"TRA","summary":{"formula":"YB4","mp_id":"mp-637","nelements":2,"is_stable":true,"nsites":20,"density":4.32754,"volume":202.83095,"a":4.01896,"b":7.10412,"c":7.10412,"alpha":90,"beta":90,"gamma":90,"space_group":"P4\/mbm","space_group_num":127,"crystal_system":"Tetragonal","formation_energy_per_atom":-0.65948,"energy_per_atom":-10.59929,"energy_above_hull":0,"point_group":"4\/mmm","Bravais_Lattice":"tP","Bravais_Combination":"tP","packing_fraction":null,"uncorrected_energy_per_atom":-10.5992859035,"volume_per_atom":10.14155,"c_over_a":1.76765,"b_over_a":1.76765,"poisson_ratio":0.18893,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":177.419,"g_vrh":139.258,"E_Calc(GPa)":331.137,"homogeneous_poisson":0.18893,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":0.432,"Lame_Lambda(GPa)":84.58033333333334,"Pugh_Ratio(K\/G)":1.274030935386118,"Ductility":"Ductile","bulk_modulus":177.419,"shear_modulus":139.258,"debye_temperature":860.1,"sound_velocity":6255.2,"homogeneity":0.189},"electronic":{"is_metal":true,"band_gap":0,"is_gap_direct":false,"cbm":null},"magnetic":{"is_magnetic":true,"total_magnetization":0,"ordering":"Unknown","num_magnetic_sites":0,"total_mag_norm_vol":0},"refs":{"mp_url":"https:\/\/materialsproject.org\/materials\/mp-637","mp_task_ids":["aaadnffm","aaadrglq","aaaemrfk","aaaeufvq","aaafsdtt"]}}}