KMnRu
High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELAMP-ID: mp-631254 · Space group: F-43m (#216)
Basic Information
Formula
KMnRu
MP-ID
mp-631254
Elements
3
Sites
3
Density
4.6525
g/cm³
Volume
69.64
ų
Cell a
4.6180
Å
Cell b
4.6180
Å
Cell c
4.6180
Å
α Angle
60.00
°
β Angle
60.00
°
γ Angle
60.00
°
Space Group
F-43m
Point Group
-43m
Crystal System
Cubic
Bravais Lattice
cF
Stability
No
Packing Fraction
0.7405
X-ray Diffraction
Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 9)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 23.60 | 3.7706 | 70.1 | (1,1,1) |
| 39.01 | 2.3090 | 100.0 | (2,1,1) |
| 46.10 | 1.9691 | 34.0 | (2,2,1) |
| 56.35 | 1.6327 | 16.0 | (2,2,0) |
| 61.93 | 1.4983 | 13.8 | (3,2,2) |
| 70.66 | 1.3331 | 31.1 | (3,3,2) |
| 75.67 | 1.2569 | 10.1 | (3,3,3) |
| 83.79 | 1.1545 | 9.6 | (4,2,2) |
| 88.59 | 1.1039 | 10.3 | (4,3,2) |
Energy Properties
Formation Energy/atom
1.51521
eV/atom
Energy/atom
-13.86017
eV/atom
Energy above Hull
1.5431
eV/atom
Uncorrected Energy
-4.9743
eV/atom
Volume/atom
23.21
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
3.9480
μB
Mag. Ordering
FiM
Mag. Sites
2
Magnetization/Volume
0.056690
μB/ų
Elastic Properties
KVRH
37.715
GPa
GVRH
-20.232
GPa
Young's Modulus E
-
GPa
Poisson Ratio ν
0.827
Pugh Ratio K/G
-1.864
Vickers Hardness Est.
-
GPa
Ductility
Ductile
Anisotropy
-5.174
Lame λ
51.203
GPa
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
K · 0.333
Element Family
Alkali-AlkEarth
Solute Fraction
0.667
Interstitial Fraction
0.000
High-Entropy Alloy Features
Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0986
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.1339
J/mol·K
Ω Parameter
1.4504
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
26.375%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.5637
smaller = more stable mixing
VEC
5.333
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-9.368
kJ/mol; negative = exothermic mixing
Entropy Norm
1.0000
SS Former
0
Phase Tendency
IM
Traditional Material Features
ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.230
Family
K-rich Multi-Component
Matrix Element
K · 0.333
Elasticity Features
Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
-5.1740
Homogeneous Poisson ν
0.8270
Homogeneity
0.8270
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-631254
Reference Citation
The crystal structure and related material properties of KMnRu were obtained from the Materials Project database (MP-ID: mp-631254, 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
3D Crystal Structure Rendering
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Raw CIF Data
# generated using pymatgen
data_KMnRu
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 4.61796872
_cell_length_b 4.61796872
_cell_length_c 4.61796872
_cell_angle_alpha 60.00000000
_cell_angle_beta 60.00000000
_cell_angle_gamma 60.00000000
_symmetry_Int_Tables_number 1
_chemical_formula_structural KMnRu
_chemical_formula_sum 'K1 Mn1 Ru1'
_cell_volume 69.63666499
_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
Mn Mn1 1 0.50000000 0.50000000 0.50000000 1.0
Ru Ru2 1 0.75000000 0.75000000 0.75000000 1.0
