{"success":true,"data":{"mp_id":"mp-27757","type":"TRA","summary":{"formula":"Be4B","mp_id":"mp-27757","nelements":2,"is_stable":true,"nsites":10,"density":1.97094,"volume":78.95966,"a":3.357,"b":3.357,"c":7.00654,"alpha":90,"beta":90,"gamma":90,"space_group":"P4\/nmm","space_group_num":129,"crystal_system":"Tetragonal","formation_energy_per_atom":-0.01672,"energy_per_atom":-4.34413,"energy_above_hull":0,"point_group":"4\/mmm","Bravais_Lattice":"tP","Bravais_Combination":"tP","packing_fraction":null,"uncorrected_energy_per_atom":-4.952637803,"volume_per_atom":7.89597,"c_over_a":2.08714,"b_over_a":1,"poisson_ratio":0.11312,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":138.194,"g_vrh":144.093,"E_Calc(GPa)":320.786,"homogeneous_poisson":0.11312,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":0.404,"Lame_Lambda(GPa)":42.13199999999999,"Pugh_Ratio(K\/G)":0.9590611618885025,"Ductility":"Ductile","bulk_modulus":138.194,"shear_modulus":144.093,"debye_temperature":1398.9,"sound_velocity":9358.3,"homogeneity":0.113},"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-27757","mp_task_ids":["aaadmtmw","aaadtadj","aaaelkmq","aaaeumje","aaafwygg"]}}}