{"success":true,"data":{"mp_id":"mp-1866","type":"TRA","summary":{"formula":"KO2","mp_id":"mp-1866","nelements":2,"is_stable":false,"nsites":3,"density":2.39878,"volume":49.21646,"a":3.85478,"b":3.85478,"c":4.28953,"alpha":116.70033,"beta":116.70034,"gamma":90.00001,"space_group":"I4\/mmm","space_group_num":139,"crystal_system":"Tetragonal","formation_energy_per_atom":-0.98019,"energy_per_atom":-4.65596,"energy_above_hull":0.01725,"point_group":"4\/mmm","Bravais_Lattice":"tI","Bravais_Combination":"tI","packing_fraction":null,"uncorrected_energy_per_atom":-6.92483027,"volume_per_atom":16.40549,"c_over_a":1.11278,"b_over_a":1,"poisson_ratio":0.32522,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":24.246,"g_vrh":9.593,"E_Calc(GPa)":25.426,"homogeneous_poisson":0.32522,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":2.878,"Lame_Lambda(GPa)":17.850666666666665,"Pugh_Ratio(K\/G)":2.527467945376837,"Ductility":"Brittle","bulk_modulus":24.246,"shear_modulus":9.593,"debye_temperature":null,"sound_velocity":null,"homogeneity":0.325},"electronic":{"is_metal":true,"band_gap":0,"is_gap_direct":false,"cbm":null},"magnetic":{"is_magnetic":true,"total_magnetization":1,"ordering":"Unknown","num_magnetic_sites":0,"total_mag_norm_vol":0.02032},"refs":{"mp_url":"https:\/\/materialsproject.org\/materials\/mp-1866","mp_task_ids":["aaadmjfp","aaaegxwt","aaaeuufv","aaafaisb","aaafscmu"]}}}