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Li2FeS2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-756348 · Space group: P2_1/c (#14)

Basic Information

Formula
Li2FeS2
MP-ID
mp-756348
Elements
3
Sites
20
Density
2.5589
g/cm³
Volume
347.45
ų
Cell a
6.3828
Å
Cell b
6.7127
Å
Cell c
8.1192
Å
α Angle
87.17
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2_1/c
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
Stability
No
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
13.21 6.7045 100.0 (0,1,0)
17.68 5.0155 97.7 (1,0,1)
19.20 4.6229 44.0 (1,1,0)
21.80 4.0762 31.1 (1,1,1)
21.92 4.0547 41.5 (0,0,2)
22.46 3.9586 9.8 (1,1,-1)
25.10 3.5479 30.4 (0,1,2)
26.24 3.3962 30.5 (0,1,-2)
26.59 3.3523 47.5 (0,2,0)
27.96 3.1914 28.6 (2,0,0)
28.79 3.1010 14.9 (1,1,2)
29.80 2.9982 10.1 (1,1,-2)
31.65 2.8272 5.5 (1,2,1)
32.58 2.7486 1.9 (1,2,-1)
32.76 2.7336 16.7 (2,1,1)
33.22 2.6973 25.0 (2,1,-1)
35.58 2.5232 2.9 (0,2,-2)
36.08 2.4891 23.4 (1,0,3)
36.74 2.4463 2.1 (1,2,2)
37.92 2.3727 1.0 (2,1,2)
37.98 2.3688 6.6 (1,1,3)
38.36 2.3465 5.0 (1,2,-2)
38.72 2.3257 4.5 (2,1,-2)
38.97 2.3114 21.2 (2,2,0)
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Energy Properties

Formation Energy/atom
-1.06446
eV/atom
Energy/atom
-5.17699
eV/atom
Energy above Hull
0.1406
eV/atom
Uncorrected Energy
-4.9758
eV/atom
Volume/atom
17.37
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
15.9991
μB
Mag. Ordering
FM
Mag. Sites
4
Magnetization/Volume
0.046050
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Li · 0.400
Element Family
Alkali-AlkEarth
Solute Fraction
0.600
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0549
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.7706
J/mol·K
Ω Parameter
0.0655
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
17.234%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.7158
smaller = more stable mixing
VEC
4.400
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-93.654
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9602
SS Former
0
Phase Tendency
AM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.294
Family
Li-rich Multi-Component
Matrix Element
Li · 0.400

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-756348
Reference Citation

The crystal structure and related material properties of Li2FeS2 were obtained from the Materials Project database (MP-ID: mp-756348, 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_Li2FeS2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.38280100
_cell_length_b   6.71268700
_cell_length_c   8.11918397
_cell_angle_alpha   87.17314647
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2FeS2
_chemical_formula_sum   'Li8 Fe4 S8'
_cell_volume   347.44917371
_cell_formula_units_Z   4
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
  Li  Li0  1  0.35601100  0.88487100  0.72854500  1.0
  Li  Li1  1  0.14398900  0.88487100  0.22854500  1.0
  Li  Li2  1  0.01016100  0.53081100  0.81919000  1.0
  Li  Li3  1  0.48983900  0.53081100  0.31919000  1.0
  Li  Li4  1  0.51016100  0.46918900  0.68081000  1.0
  Li  Li5  1  0.98983900  0.46918900  0.18081000  1.0
  Li  Li6  1  0.85601100  0.11512900  0.77145500  1.0
  Li  Li7  1  0.64398900  0.11512900  0.27145500  1.0
  Fe  Fe8  1  0.61823200  0.65064500  0.99249800  1.0
  Fe  Fe9  1  0.88176800  0.65064500  0.49249800  1.0
  Fe  Fe10  1  0.11823200  0.34935500  0.50750200  1.0
  Fe  Fe11  1  0.38176800  0.34935500  0.00750200  1.0
  S  S12  1  0.73332400  0.77614900  0.73425500  1.0
  S  S13  1  0.76667600  0.77614900  0.23425500  1.0
  S  S14  1  0.26068200  0.68775000  0.99835000  1.0
  S  S15  1  0.23931800  0.68775000  0.49835000  1.0
  S  S16  1  0.76068200  0.31225000  0.50165000  1.0
  S  S17  1  0.73931800  0.31225000  0.00165000  1.0
  S  S18  1  0.23332400  0.22385100  0.76574500  1.0
  S  S19  1  0.26667600  0.22385100  0.26574500  1.0
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