{"success":true,"data":{"mp_id":"mp-864647","type":"TRA","summary":{"formula":"Hf2N","mp_id":"mp-864647","nelements":2,"is_stable":true,"nsites":6,"density":13.46205,"volume":91.52213,"a":5.31312,"b":5.31312,"c":3.2421,"alpha":90,"beta":90,"gamma":90,"space_group":"P4_2\/mnm","space_group_num":136,"crystal_system":"Tetragonal","formation_energy_per_atom":-1.40782,"energy_per_atom":-34.55168,"energy_above_hull":0,"point_group":"4\/mmm","Bravais_Lattice":"tP","Bravais_Combination":"tP","packing_fraction":null,"uncorrected_energy_per_atom":-34.551684585,"volume_per_atom":15.25369,"c_over_a":0.61021,"b_over_a":1,"poisson_ratio":0.1992,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":194.409,"g_vrh":146.294,"E_Calc(GPa)":350.871,"homogeneous_poisson":0.1992,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":-3.214,"Lame_Lambda(GPa)":96.87966666666665,"Pugh_Ratio(K\/G)":1.3288925041355077,"Ductility":"Ductile","bulk_modulus":194.409,"shear_modulus":146.294,"debye_temperature":436.7,"sound_velocity":3639,"homogeneity":0.199},"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-864647","mp_task_ids":["aaachveu","aaadwfsq","aaaelhce","aaaeptpc","aaafbjfc"]}}}