{"success":true,"data":{"mp_id":"mp-1025354","type":"HEA","summary":{"mp_id":"mp-1025354","formula":"Er2Fe2Si2C","nelements":4,"nsites":7,"density":8.23324,"volume":103.74578,"energy_above_hull":0,"formation_energy_per_atom":-0.67982,"energy_per_atom":-7.27369,"is_stable":true,"uncorrected_energy_per_atom":-18.3612,"last_updated":"2025-09-23 22:48:27.851000+00:00","deprecated":false,"possible_species":["Fe3+","Er3+","C4-","Si4-"],"crystal_system":"Monoclinic","space_group":"C2\/m","space_group_num":12,"point_group":"2\/m","a":5.57049,"b":5.57049,"c":6.64402,"alpha":53.3479,"beta":53.3479,"gamma":40.7406,"volume_cell":103.74578,"volume_per_atom":14.82083,"c_over_a":1.19272,"b_over_a":1,"Bravais_Lattice":"aP","Lattice_Type_Detail":"Triclinic","Lattice_Centering":"C-Centered","Is_FCC":false,"Is_BCC":false,"Is_HCP":false,"packing_fraction":null},"elasticity":{"k_vrh":131.673,"g_vrh":83.433,"k_voigt":133.675,"g_voigt":87.046,"k_reuss":129.671,"g_reuss":79.819,"poisson_ratio":null,"universal_anisotropy":0.484,"homogeneous_poisson":0.238,"E_Calc(GPa)":206.652,"nu_Calc":0.23843,"Lame_Lambda(GPa)":76.051,"Pugh_Ratio(K\/G)":1.5782,"Cauchy_Pressure(GPa)":-7.382,"Vickers_Hard_Est(GPa)":12.602,"Ductility":"Brittle","Gruneisen_Approx":1.446},"electronic":{"is_metal":true,"band_gap":0,"is_gap_direct":false,"cbm":null,"vbm":null},"magnetic":{"total_magnetization":3.0e-5,"total_mag_norm_vol":0,"num_magnetic_sites":0,"ordering":"NM","is_magnetic":false},"refs":{"dois":[],"bibtex_entries":[],"origin_tasks":["mp-2911779","mp-2911779","mp-2911779"],"raw_refs":[],"mp_task_ids":["mp-1263405","mp-2346105","mp-1078193","mp-2346118","mp-1413543","mp-2450908","mp-2450902","mp-2911779","mp-1697438","mp-1798213","mp-1158793","mp-2186818","mp-2451044","mp-2451031","mp-2346094","mp-2451151","mp-2451058","mp-1257791","mp-2451197","mp-1025354","mp-2450860","mp-2346108","mp-2346124","mp-2451008","mp-2451134","mp-2451104","mp-2343576","mp-2346114","mp-2346193","mp-2451001","mp-1264933","mp-2346107","mp-2451130","mp-1594718"],"mp_url":"https:\/\/next-gen.materialsproject.org\/materials\/mp-1025354"}}}