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KCrC4O13

High-Entropy Materials HEA

MP-ID: mp-1181049 · Space group: P2/c (#13)

Basic Information

Formula
KCrC4O13
MP-ID
mp-1181049
Elements
4
Sites
38
Density
1.9957
g/cm³
Volume
577.66
ų
Cell a
5.3023
Å
Cell b
7.7701
Å
Cell c
14.5832
Å
α Angle
74.04
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2/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
11.85 7.4707 80.4 (0,1,0)
12.63 7.0106 21.6 (0,0,2)
14.76 6.0013 18.8 (0,1,2)
16.72 5.3023 68.4 (1,0,0)
17.89 4.9595 11.5 (1,0,1)
19.60 4.5286 73.1 (0,1,-2)
20.51 4.3305 1.8 (1,1,1)
20.54 4.3239 1.1 (1,1,0)
21.01 4.2290 71.9 (1,0,2)
22.37 3.9735 4.5 (1,1,2)
22.46 3.9583 15.1 (1,1,-1)
24.92 3.5736 1.7 (0,1,4)
25.40 3.5061 23.2 (1,0,3)
25.41 3.5053 1.3 (0,0,4)
25.87 3.4435 93.6 (1,1,-2)
28.48 3.1338 27.4 (1,2,1)
29.16 3.0630 13.3 (1,2,2)
29.25 3.0537 14.6 (1,2,0)
29.77 3.0006 28.6 (0,2,4)
30.04 2.9747 1.1 (0,2,-2)
30.31 2.9487 100.0 (1,1,-3)
30.57 2.9241 6.8 (1,0,4)
33.81 2.6511 3.3 (2,0,0)
34.34 2.6115 1.8 (1,2,4)
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Energy Properties

Formation Energy/atom
-0.90269
eV/atom
Energy/atom
-6.79911
eV/atom
Energy above Hull
0.7724
eV/atom
Uncorrected Energy
-6.5837
eV/atom
Volume/atom
15.20
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
18.0020
μB
Mag. Ordering
FM
Mag. Sites
12
Magnetization/Volume
0.031160
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.684
Element Family
Metalloid-Nonmetal
Solute Fraction
0.316
Interstitial Fraction
0.211

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.8976
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.4628
J/mol·K
Ω Parameter
2.6907
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
49.663%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.7206
smaller = more stable mixing
VEC
3.947
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-2.704
kJ/mol; negative = exothermic mixing
Entropy Norm
0.6475
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1181049
Reference Citation

The crystal structure and related material properties of KCrC4O13 were obtained from the Materials Project database (MP-ID: mp-1181049, 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_KCrC4O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.30225000
_cell_length_b   7.77007000
_cell_length_c   14.58315722
_cell_angle_alpha   74.04325417
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KCrC4O13
_chemical_formula_sum   'K2 Cr2 C8 O26'
_cell_volume   577.65988003
_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
  K  K0  1  0.69496300  0.00000000  0.75000000  1.0
  K  K1  1  0.30503700  0.00000000  0.25000000  1.0
  Cr  Cr2  1  0.50000000  0.50000000  0.50000000  1.0
  Cr  Cr3  1  0.50000000  0.50000000  0.00000000  1.0
  C  C4  1  0.70854000  0.66421400  0.62872300  1.0
  C  C5  1  0.70854000  0.33578600  0.87127700  1.0
  C  C6  1  0.29146000  0.33578600  0.37127700  1.0
  C  C7  1  0.29146000  0.66421400  0.12872300  1.0
  C  C8  1  0.46738800  0.77773000  0.58765500  1.0
  C  C9  1  0.46738800  0.22227000  0.91234500  1.0
  C  C10  1  0.53261200  0.22227000  0.41234500  1.0
  C  C11  1  0.53261200  0.77773000  0.08765500  1.0
  O  O12  1  0.74581000  0.52790100  0.59602800  1.0
  O  O13  1  0.74581000  0.47209900  0.90397200  1.0
  O  O14  1  0.25419000  0.47209900  0.40397200  1.0
  O  O15  1  0.25419000  0.52790100  0.09602800  1.0
  O  O16  1  0.35339000  0.71807600  0.52341100  1.0
  O  O17  1  0.35339000  0.28192400  0.97658900  1.0
  O  O18  1  0.64661000  0.28192400  0.47658900  1.0
  O  O19  1  0.64661000  0.71807600  0.02341100  1.0
  O  O20  1  0.84146400  0.71023800  0.68796500  1.0
  O  O21  1  0.84146400  0.28976200  0.81203500  1.0
  O  O22  1  0.15853600  0.28976200  0.31203500  1.0
  O  O23  1  0.15853600  0.71023800  0.18796500  1.0
  O  O24  1  0.40556800  0.90608900  0.61664700  1.0
  O  O25  1  0.40556800  0.09391100  0.88335300  1.0
  O  O26  1  0.59443200  0.09391100  0.38335300  1.0
  O  O27  1  0.59443200  0.90608900  0.11664700  1.0
  O  O28  1  0.26677100  0.33556800  0.61954600  1.0
  O  O29  1  0.26677100  0.66443200  0.88045400  1.0
  O  O30  1  0.73322900  0.66443200  0.38045400  1.0
  O  O31  1  0.73322900  0.33556800  0.11954600  1.0
  O  O32  1  0.11590400  0.21931800  0.60836000  1.0
  O  O33  1  0.11590400  0.78068200  0.89164000  1.0
  O  O34  1  0.88409600  0.78068200  0.39164000  1.0
  O  O35  1  0.88409600  0.21931800  0.10836000  1.0
  O  O36  1  0.14581300  0.50000000  0.75000000  1.0
  O  O37  1  0.85418700  0.50000000  0.25000000  1.0
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