{"success":true,"data":{"mp_id":"mp-30581","type":"TRA","summary":{"formula":"Hf2Cu","mp_id":"mp-30581","nelements":2,"is_stable":true,"nsites":3,"density":12.63581,"volume":55.26355,"a":3.15284,"b":3.15283,"c":5.98985,"alpha":105.25894,"beta":105.25893,"gamma":89.99999,"space_group":"I4\/mmm","space_group_num":139,"crystal_system":"Tetragonal","formation_energy_per_atom":-0.15994,"energy_per_atom":-8.16447,"energy_above_hull":0,"point_group":"4\/mmm","Bravais_Lattice":"tI","Bravais_Combination":"tI","packing_fraction":null,"uncorrected_energy_per_atom":-33.87561509333333,"volume_per_atom":18.42118,"c_over_a":1.89983,"b_over_a":1,"poisson_ratio":0.30854,"Is_FCC":0,"Is_BCC":0,"Is_HCP":0},"elasticity":{"k_vrh":123.959,"g_vrh":54.412,"E_Calc(GPa)":142.4,"homogeneous_poisson":0.30854,"Vickers_Hard_Est(GPa)":null,"universal_anisotropy":0.258,"Lame_Lambda(GPa)":87.68433333333334,"Pugh_Ratio(K\/G)":2.278155553921929,"Ductility":"Brittle","bulk_modulus":123.959,"shear_modulus":54.412,"debye_temperature":261.5,"sound_velocity":2320.4,"homogeneity":0.309},"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-30581","mp_task_ids":["aaadminl","aaaegwap","aaaeqqnz","aaafarpt","aaafbykq"]}}}