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La2Fe2Si2C

High-Entropy Materials HEA

MP-ID: mp-1025290 · Space group: C2/m (#12)

Basic Information

Formula
La2Fe2Si2C
MP-ID
mp-1025290
Elements
4
Sites
7
Density
6.1303
g/cm³
Volume
123.97
ų
Cell a
5.8180
Å
Cell b
5.8180
Å
Cell c
7.1073
Å
α Angle
55.61
°
β Angle
55.61
°
γ Angle
40.17
°
Space Group
C2/m
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic C
Stability
Yes
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
15.61 5.6782 3.9 (0,0,1)
16.58 5.3481 1.7 (1,1,1)
20.34 4.3655 12.7 (1,1,0)
24.50 3.6333 62.5 (1,0,0)
25.11 3.5470 37.1 (1,1,2)
25.59 3.4815 3.8 (1,0,1)
31.51 2.8391 19.5 (0,0,2)
32.41 2.7626 48.0 (1,0,-1)
32.53 2.7522 42.7 (1,1,-1)
33.40 2.6829 59.0 (2,1,1)
33.51 2.6740 37.2 (2,2,2)
34.00 2.6366 26.3 (2,2,1)
34.90 2.5710 100.0 (1,0,2)
35.83 2.5064 34.8 (2,1,2)
38.26 2.3525 50.4 (2,1,0)
38.84 2.3185 12.9 (1,1,3)
40.11 2.2480 18.4 (2,2,3)
41.37 2.1827 1.4 (2,2,0)
44.52 2.0350 1.1 (2,1,3)
45.19 2.0067 2.4 (1,0,-2)
45.40 1.9979 38.4 (1,-1,0)
47.42 1.9173 4.7 (3,2,2)
47.56 1.9118 2.2 (1,1,-2)
48.07 1.8927 8.9 (0,0,3)
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Energy Properties

Formation Energy/atom
-0.58237
eV/atom
Energy/atom
-7.28147
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-17.0402
eV/atom
Volume/atom
17.71
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0000
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
La · 0.286
Element Family
Lanthanide
Solute Fraction
0.714
Interstitial Fraction
0.429

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3518
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.2387
J/mol·K
Ω Parameter
0.4333
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
29.596%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4694
smaller = more stable mixing
VEC
4.857
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-48.925
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9751
SS Former
0
Phase Tendency
AM

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1025290
Reference Citation

The crystal structure and related material properties of La2Fe2Si2C were obtained from the Materials Project database (MP-ID: mp-1025290, 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_La2Fe2Si2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.81798141
_cell_length_b   5.81798141
_cell_length_c   7.10728539
_cell_angle_alpha   55.60711335
_cell_angle_beta   55.60711335
_cell_angle_gamma   40.16763380
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2Fe2Si2C
_chemical_formula_sum   'La2 Fe2 Si2 C1'
_cell_volume   123.97355549
_cell_formula_units_Z   1
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
  La  La0  1  0.44545774  0.44545774  0.30262375  1.0
  La  La1  1  0.55454226  0.55454226  0.69737625  1.0
  Fe  Fe2  1  0.81143634  0.81143634  0.07770187  1.0
  Fe  Fe3  1  0.18856366  0.18856366  0.92229813  1.0
  Si  Si4  1  0.80670891  0.80670891  0.76204462  1.0
  Si  Si5  1  0.19329109  0.19329109  0.23795538  1.0
  C  C6  1  0.00000000  0.00000000  -0.00000000  1.0
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