{"success":true,"data":{"mp_id":"mp-1257615","type":"TRA","summary":{"formula":"MgSi2","mp_id":"mp-1257615","nelements":2,"is_stable":false,"nsites":12,"density":2.58346,"volume":206.90628,"a":3.33802,"b":9.80998,"c":6.74837,"alpha":89.75853,"beta":90.59807,"gamma":110.55166,"space_group":"I4\/mmm","space_group_num":139,"crystal_system":"Tetragonal","formation_energy_per_atom":0.2561,"energy_per_atom":-3.90427,"energy_above_hull":0.3104,"point_group":"4\/mmm","Bravais_Lattice":"tI","Bravais_Combination":"tI","packing_fraction":null,"uncorrected_energy_per_atom":-3.9516043958333333,"volume_per_atom":17.24219,"c_over_a":2.02167,"b_over_a":2.93886,"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":0.00123,"ordering":"NM","num_magnetic_sites":0,"total_mag_norm_vol":1.0e-5},"refs":{"mp_url":"https:\/\/materialsproject.org\/materials\/mp-1257615","mp_task_ids":["aaaeaiix"]},"xrd":{"by_target":{"AgKa":{"radiation":"Ag Kα","wavelength":0.5609,"n_peaks":157,"three_strong":[13.504,13.6462,14.2137]},"CoKa":{"radiation":"Co Kα","wavelength":1.7903,"n_peaks":47,"three_strong":[44.0822,44.5691,46.519]},"CrKa":{"radiation":"Cr Kα","wavelength":2.291,"n_peaks":22,"three_strong":[57.4017,58.0605,60.7092]},"CuKa":{"radiation":"Cu Kα","wavelength":1.5418,"n_peaks":65,"three_strong":[37.7129,38.1235,39.7659]},"MoKa":{"radiation":"Mo Kα","wavelength":0.7107,"n_peaks":154,"three_strong":[17.1359,17.3169,18.0393]}}}}}