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Tl2Fe3Se4

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1101014 · Space group: P-1 (#2)

Basic Information

Formula
Tl2Fe3Se4
MP-ID
mp-1101014
Elements
3
Sites
18
Density
6.9012
g/cm³
Volume
429.33
ų
Cell a
5.5370
Å
Cell b
7.6221
Å
Cell c
10.8468
Å
α Angle
69.70
°
β Angle
89.49
°
γ Angle
89.60
°
Space Group
P-1
Point Group
-1
Crystal System
Triclinic
Bravais Lattice
Triclinic 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
12.42 7.1262 20.9 (0,1,1)
17.43 5.0865 2.4 (0,0,2)
17.46 5.0787 2.4 (0,1,-1)
18.19 4.8774 2.5 (1,0,1)
18.30 4.8491 3.9 (1,0,-1)
20.25 4.3862 1.2 (1,1,0)
20.33 4.3686 1.7 (1,-1,0)
23.67 3.7588 15.7 (1,0,2)
23.72 3.7514 1.5 (1,1,2)
23.77 3.7436 14.0 (1,-1,1)
23.78 3.7417 15.4 (1,1,-1)
23.84 3.7329 14.0 (1,0,-2)
24.85 3.5825 1.3 (0,1,3)
24.91 3.5744 1.2 (0,2,0)
24.99 3.5631 30.5 (0,2,2)
28.34 3.1495 1.6 (1,2,1)
29.57 3.0208 100.0 (1,1,3)
29.69 3.0087 99.2 (1,2,0)
29.81 2.9973 99.9 (1,-2,0)
29.83 2.9950 98.9 (1,-1,-3)
32.34 2.7684 47.7 (2,0,0)
32.93 2.7202 45.7 (0,1,-3)
33.46 2.6777 1.2 (1,2,3)
34.66 2.5884 31.9 (2,1,1)
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Energy Properties

Formation Energy/atom
-0.42879
eV/atom
Energy/atom
-5.33286
eV/atom
Energy above Hull
0.0671
eV/atom
Uncorrected Energy
-5.1231
eV/atom
Volume/atom
23.85
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
19.3248
μB
Mag. Ordering
FM
Mag. Sites
6
Magnetization/Volume
0.045010
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Se · 0.444
Element Family
Metalloid-Nonmetal
Solute Fraction
0.556
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0609
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.8200
J/mol·K
Ω Parameter
1.1027
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
16.388%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4068
smaller = more stable mixing
VEC
5.111
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
7.610
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9656
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.357
Family
Se-rich Multi-Component
Matrix Element
Se · 0.444

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1101014
Reference Citation

The crystal structure and related material properties of Tl2Fe3Se4 were obtained from the Materials Project database (MP-ID: mp-1101014, 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_Tl2Fe3Se4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.53704100
_cell_length_b   7.62205807
_cell_length_c   10.84683565
_cell_angle_alpha   69.70276972
_cell_angle_beta   89.48891368
_cell_angle_gamma   89.59965098
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tl2Fe3Se4
_chemical_formula_sum   'Tl4 Fe6 Se8'
_cell_volume   429.32997365
_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
  Tl  Tl0  1  0.00702200  0.74880300  0.74620900  1.0
  Tl  Tl1  1  0.50000000  0.50000000  0.00000000  1.0
  Tl  Tl2  1  0.99297800  0.25119700  0.25379100  1.0
  Tl  Tl3  1  0.50000000  0.00000000  0.50000000  1.0
  Fe  Fe4  1  0.25024700  0.00242800  0.99741200  1.0
  Fe  Fe5  1  0.74975300  0.99757200  0.00258800  1.0
  Fe  Fe6  1  0.74936500  0.74364700  0.25706200  1.0
  Fe  Fe7  1  0.25188000  0.49932600  0.49978500  1.0
  Fe  Fe8  1  0.74812000  0.50067400  0.50021500  1.0
  Fe  Fe9  1  0.25063500  0.25635300  0.74293800  1.0
  Se  Se10  1  0.50431100  0.98301800  0.82465200  1.0
  Se  Se11  1  0.99930700  0.27236900  0.92089500  1.0
  Se  Se12  1  0.00069300  0.72763100  0.07910500  1.0
  Se  Se13  1  0.49568900  0.01698200  0.17534800  1.0
  Se  Se14  1  0.50064000  0.46301200  0.32017500  1.0
  Se  Se15  1  0.00180900  0.78600100  0.42832400  1.0
  Se  Se16  1  0.99819100  0.21399900  0.57167600  1.0
  Se  Se17  1  0.49936000  0.53698800  0.67982500  1.0
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