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Cr(FeSe2)2

High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELA

MP-ID: mp-568349 · Space group: C2/m (#12)

Basic Information

Formula
Cr(FeSe2)2
MP-ID
mp-568349
Elements
3
Sites
7
Density
6.3861
g/cm³
Volume
124.69
ų
Cell a
3.5269
Å
Cell b
6.1938
Å
Cell c
6.6430
Å
α Angle
115.93
°
β Angle
105.39
°
γ Angle
90.00
°
Space Group
C2/m
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic C
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
15.52 5.7079 15.8 (0,0,1)
16.52 5.3667 9.9 (0,1,-1)
26.45 3.3697 8.7 (1,0,-1)
27.93 3.1942 1.9 (0,1,-2)
31.34 2.8539 9.4 (0,0,2)
32.44 2.7600 34.3 (0,2,0)
32.94 2.7188 100.0 (1,-1,-1)
33.39 2.6834 53.0 (0,2,-2)
33.42 2.6814 40.2 (1,1,-2)
34.68 2.5867 13.3 (1,0,-2)
39.74 2.2683 10.5 (1,2,-2)
42.35 2.1342 15.0 (0,2,1)
42.67 2.1191 9.7 (0,1,-3)
42.95 2.1060 52.1 (1,-1,-2)
43.70 2.0714 47.4 (1,1,-3)
43.87 2.0639 18.0 (0,2,-3)
44.90 2.0187 5.9 (0,3,-2)
45.17 2.0075 10.8 (1,-2,-1)
46.25 1.9629 3.0 (1,2,-3)
47.44 1.9166 1.6 (1,0,-3)
49.54 1.8400 5.8 (0,3,0)
51.30 1.7810 52.1 (1,3,-2)
51.85 1.7635 31.9 (2,0,-1)
53.45 1.7144 1.1 (1,-3,0)
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Energy Properties

Formation Energy/atom
-0.56055
eV/atom
Energy/atom
-6.35722
eV/atom
Energy above Hull
0.0901
eV/atom
Uncorrected Energy
-6.0875
eV/atom
Volume/atom
17.81
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
7.3117
μB
Mag. Ordering
FM
Mag. Sites
3
Magnetization/Volume
0.058640
μB/ų

Elastic Properties

KVRH
64.817
GPa
GVRH
31.014
GPa
Young's Modulus E
80.244
GPa
Poisson Ratio ν
0.294
Pugh Ratio K/G
2.090
Vickers Hardness Est.
3.296
GPa
Ductility
Brittle
Anisotropy
-4.234
Lame λ
44.141
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Se · 0.571
Element Family
Metalloid-Nonmetal
Solute Fraction
0.429
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9557
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.9457
J/mol·K
Ω Parameter
54.0765
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
4.839%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3879
smaller = more stable mixing
VEC
5.429
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-0.163
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8699
SS Former
1
Phase Tendency
SS

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.449
Family
Se-rich Multi-Component
Matrix Element
Se · 0.571

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
-4.2340
Homogeneous Poisson ν
0.2940
Debye Temperature
401.1
K
Sound Velocity
2,459.6
m/s
Homogeneity
0.2940

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-568349
Reference Citation

The crystal structure and related material properties of Cr(FeSe2)2 were obtained from the Materials Project database (MP-ID: mp-568349, 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_Cr(FeSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.52689800
_cell_length_b   6.19380579
_cell_length_c   6.64297966
_cell_angle_alpha   115.93307824
_cell_angle_beta   105.39432025
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cr(FeSe2)2
_chemical_formula_sum   'Cr1 Fe2 Se4'
_cell_volume   124.68788291
_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
  Cr  Cr0  1  0.00000000  0.00000000  0.00000000  1.0
  Fe  Fe1  1  0.74400700  0.69286100  0.48801400  1.0
  Fe  Fe2  1  0.25599300  0.30713900  0.51198600  1.0
  Se  Se3  1  0.36006800  0.01921600  0.72013600  1.0
  Se  Se4  1  0.11270300  0.45670600  0.22540600  1.0
  Se  Se5  1  0.88729700  0.54329400  0.77459400  1.0
  Se  Se6  1  0.63993200  0.98078400  0.27986400  1.0
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