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KCr2Fe3O14

High-Entropy Materials HEA

MP-ID: mp-1180836 · Space group: R-3m (#166)

Basic Information

Formula
KCr2Fe3O14
MP-ID
mp-1180836
Elements
4
Sites
20
Density
3.2871
g/cm³
Volume
270.07
ų
Cell a
7.2910
Å
Cell b
7.2910
Å
Cell c
7.2910
Å
α Angle
59.36
°
β Angle
59.36
°
γ Angle
59.36
°
Space Group
R-3m
Point Group
-3m
Crystal System
Trigonal
Bravais Lattice
Trigonal R
Stability
No
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
14.81 5.9817 13.7 (1,1,1)
15.00 5.9048 34.3 (1,0,0)
17.29 5.1301 98.9 (1,1,0)
24.42 3.6452 4.9 (2,1,1)
24.66 3.6102 9.7 (1,-1,0)
24.66 3.6102 19.3 (1,0,-1)
28.68 3.1127 2.5 (2,2,1)
28.89 3.0909 100.0 (2,0,1)
28.89 3.0909 50.0 (2,1,0)
28.99 3.0801 64.7 (1,-1,1)
28.99 3.0801 32.3 (1,1,-1)
29.87 2.9908 41.0 (2,2,2)
30.27 2.9524 17.8 (2,0,0)
34.98 2.5651 15.2 (2,2,0)
37.93 2.3720 49.5 (3,2,2)
38.18 2.3575 1.5 (1,1,3)
38.18 2.3575 3.0 (3,1,1)
38.42 2.3432 1.0 (2,0,-1)
42.83 2.1114 2.7 (3,2,3)
42.83 2.1114 1.4 (3,3,2)
45.49 1.9939 8.7 (3,3,3)
45.77 1.9824 4.2 (3,1,3)
45.77 1.9824 2.1 (3,3,1)
46.12 1.9683 31.3 (2,-1,2)
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Energy Properties

Formation Energy/atom
-1.23576
eV/atom
Energy/atom
-6.99171
eV/atom
Energy above Hull
0.2725
eV/atom
Uncorrected Energy
-5.9725
eV/atom
Volume/atom
13.50
ų
c/a Ratio
1.0000

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
13.3764
μB
Mag. Ordering
FM
Mag. Sites
11
Magnetization/Volume
0.049530
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.700
Element Family
Metalloid-Nonmetal
Solute Fraction
0.300
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9143
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.6014
J/mol·K
Ω Parameter
69.0251
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
49.891%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.8636
smaller = more stable mixing
VEC
4.650
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-0.060
kJ/mol; negative = exothermic mixing
Entropy Norm
0.6595
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1180836
Reference Citation

The crystal structure and related material properties of KCr2Fe3O14 were obtained from the Materials Project database (MP-ID: mp-1180836, 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_KCr2Fe3O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.29099171
_cell_length_b   7.29099171
_cell_length_c   7.29099233
_cell_angle_alpha   59.36045986
_cell_angle_beta   59.36045986
_cell_angle_gamma   59.36046807
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KCr2Fe3O14
_chemical_formula_sum   'K1 Cr2 Fe3 O14'
_cell_volume   270.06999705
_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
  K  K0  1  0.00000000  0.00000000  0.00000000  1.0
  Cr  Cr1  1  0.68807000  0.68807000  0.68807000  1.0
  Cr  Cr2  1  0.31193000  0.31193000  0.31193000  1.0
  Fe  Fe3  1  0.00000000  0.50000000  0.00000000  1.0
  Fe  Fe4  1  0.00000000  0.00000000  0.50000000  1.0
  Fe  Fe5  1  0.50000000  0.00000000  0.00000000  1.0
  O  O6  1  0.59834300  0.59834300  0.59834300  1.0
  O  O7  1  0.40165700  0.40165700  0.40165700  1.0
  O  O8  1  0.84755100  0.47008500  0.84755100  1.0
  O  O9  1  0.84755100  0.84755100  0.47008500  1.0
  O  O10  1  0.47008500  0.84755100  0.84755100  1.0
  O  O11  1  0.15244900  0.52991500  0.15244900  1.0
  O  O12  1  0.15244900  0.15244900  0.52991500  1.0
  O  O13  1  0.52991500  0.15244900  0.15244900  1.0
  O  O14  1  0.74094800  0.09054200  0.74094800  1.0
  O  O15  1  0.74094800  0.74094800  0.09054200  1.0
  O  O16  1  0.09054200  0.74094800  0.74094800  1.0
  O  O17  1  0.25905200  0.90945800  0.25905200  1.0
  O  O18  1  0.25905200  0.25905200  0.90945800  1.0
  O  O19  1  0.90945800  0.25905200  0.25905200  1.0
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