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UFeC2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1095137 · Space group: P4/nmm (#129)

Basic Information

Formula
UFeC2
MP-ID
mp-1095137
Elements
3
Sites
8
Density
11.4987
g/cm³
Volume
91.81
ų
Cell a
3.4711
Å
Cell b
3.4711
Å
Cell c
7.6206
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4/nmm
Point Group
4/mmm
Crystal System
Tetragonal
Bravais Lattice
Tetragonal P
Stability
Yes
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
11.61 7.6206 10.7 (0,0,1)
23.35 3.8103 7.4 (0,0,2)
28.25 3.1588 100.0 (1,0,1)
34.97 2.5660 58.8 (1,0,2)
35.33 2.5402 33.9 (0,0,3)
36.61 2.4544 27.5 (1,1,0)
38.54 2.3362 36.4 (1,1,1)
43.88 2.0634 36.0 (1,1,2)
44.18 2.0499 1.2 (1,0,3)
51.80 1.7651 16.5 (1,1,3)
52.74 1.7355 25.0 (2,0,0)
54.20 1.6922 1.3 (2,0,1)
54.98 1.6701 23.7 (1,0,4)
58.43 1.5794 2.8 (2,0,2)
60.91 1.5211 26.2 (2,1,1)
61.63 1.5050 6.9 (1,1,4)
64.86 1.4376 20.9 (2,1,2)
65.09 1.4330 23.4 (2,0,3)
67.07 1.3955 6.5 (1,0,5)
73.08 1.2948 8.9 (1,1,5)
74.74 1.2701 4.1 (0,0,6)
77.83 1.2272 8.1 (2,2,0)
79.67 1.2034 17.2 (2,1,4)
82.60 1.1681 1.2 (2,2,2)
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Energy Properties

Formation Energy/atom
-0.14342
eV/atom
Energy/atom
-9.69926
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-28.7085
eV/atom
Volume/atom
11.48
ų
c/a Ratio
2.1955

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
2.1143
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.023030
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
C · 0.500
Element Family
Metalloid-Nonmetal
Solute Fraction
0.500
Interstitial Fraction
0.500

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0397
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.6442
J/mol·K
Ω Parameter
0.9390
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
35.717%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4986
smaller = more stable mixing
VEC
5.333
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-25.000
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9464
SS Former
0
Phase Tendency
AM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.429
Family
Interstitial Alloy
Matrix Element
C · 0.500

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1095137
Reference Citation

The crystal structure and related material properties of UFeC2 were obtained from the Materials Project database (MP-ID: mp-1095137, database version v2026.04.13).

Literature Citation

Horton, M.K., Huck, P., Yang, R.X. et al. Accelerated data-driven materials science with the Materials Project. Nat. Mater. 24, 1522–1532 (2025). https://doi.org/10.1038/s41563-025-02272-0

BibTeX
@article{Horton2025,
  author  = {Horton, Matthew K. and Huck, Patrick and Yang, Ruo Xi and Munro, Jason M. and Dwaraknath, Shyam and Ganose, Alex M. and Kingsbury, Ryan S. and Wen, Mingjian and Shen, Jimmy X. and Mathis, Tyler S. and Kaplan, Aaron D. and Berket, Karlo and Riebesell, Janosh and George, Janine and Rosen, Andrew S. and Spotte-Smith, Evan W. C. and McDermott, Matthew J. and Cohen, Orion A. and Dunn, Alex and Kuner, Matthew C. and Rignanese, Gian-Marco and Petretto, Guido and Waroquiers, David and Griffin, Sinead M. and Neaton, Jeffrey B. and Chrzan, Daryl C. and Asta, Mark and Hautier, Geoffroy and Cholia, Shreyas and Ceder, Gerbrand and Ong, Shyue Ping and Jain, Anubhav and Persson, Kristin A.},
  title   = {Accelerated data-driven materials science with the Materials Project},
  journal = {Nature Materials},
  year    = {2025},
  volume  = {24},
  number  = {10},
  pages   = {1522--1532},
  month   = {oct},
  doi     = {10.1038/s41563-025-02272-0},
  issn    = {1476-4660},
  url     = {https://doi.org/10.1038/s41563-025-02272-0},
  abstract = {The Materials Project was launched formally in 2011 to drive materials discovery forwards through high-throughput computation and open data. More than a decade later, the Materials Project has become an indispensable tool used by more than 600,000 materials researchers around the world. This Perspective describes how the Materials Project, as a data platform and a software ecosystem, has helped to shape research in data-driven materials science. We cover how sustainable software and computational methods have accelerated materials design while becoming more open source and collaborative in nature. Next, we present cases where the Materials Project was used to understand and discover functional materials. We then describe our efforts to meet the needs of an expanding user base, through technical infrastructure updates ranging from data architecture and cloud resources to interactive web applications. Finally, we discuss opportunities to better aid the research community, with the vision that more accessible and easy-to-understand materials data will result in democratized materials knowledge and an increasingly collaborative community.}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_UFeC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.47106306
_cell_length_b   3.47106306
_cell_length_c   7.62058884
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   UFeC2
_chemical_formula_sum   'U2 Fe2 C4'
_cell_volume   91.81497871
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  U  U0  1  -0.00000000  0.50000000  0.67406415  1.0
  U  U1  1  0.50000000  0.00000000  0.32593585  1.0
  Fe  Fe2  1  0.00000000  0.00000000  0.00000000  1.0
  Fe  Fe3  1  0.50000000  0.50000000  0.00000000  1.0
  C  C4  1  0.00000000  0.50000000  0.17048952  1.0
  C  C5  1  0.50000000  0.00000000  0.82951048  1.0
  C  C6  1  -0.00000000  0.50000000  0.36199300  1.0
  C  C7  1  0.50000000  0.00000000  0.63800700  1.0
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