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HfInCo2

High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELA

MP-ID: mp-864715 · Space group: Fm-3m (#225)

Basic Information

Formula
HfInCo2
MP-ID
mp-864715
Elements
3
Sites
4
Density
11.4316
g/cm³
Volume
59.73
ų
Cell a
4.3882
Å
Cell b
4.3870
Å
Cell c
4.3893
Å
α Angle
59.98
°
β Angle
59.96
°
γ Angle
60.02
°
Space Group
Fm-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
Cubic F
Stability
Yes
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
24.85 3.5834 7.2 (1,1,1)
24.85 3.5824 7.3 (1,0,0)
24.86 3.5822 7.3 (0,1,0)
24.86 3.5819 7.2 (0,0,1)
28.76 3.1043 42.1 (1,0,1)
28.77 3.1028 42.0 (0,1,1)
28.79 3.1005 41.9 (1,1,0)
41.13 2.1947 100.0 (1,1,2)
41.14 2.1944 100.0 (1,-1,0)
41.14 2.1941 99.9 (2,1,1)
41.15 2.1935 99.8 (1,2,1)
41.16 2.1933 99.8 (0,1,-1)
41.16 2.1929 99.8 (1,0,-1)
48.64 1.8719 1.3 (2,1,2)
48.65 1.8717 1.3 (2,0,1)
48.65 1.8715 1.3 (1,0,2)
48.65 1.8715 1.3 (1,-1,1)
48.66 1.8713 1.3 (1,2,2)
48.66 1.8710 1.3 (0,2,1)
48.67 1.8709 1.3 (1,-1,-1)
48.67 1.8709 1.3 (0,1,2)
48.68 1.8703 1.3 (2,2,1)
48.69 1.8700 1.3 (2,1,0)
48.70 1.8699 1.3 (1,2,0)
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Energy Properties

Formation Energy/atom
-0.28119
eV/atom
Energy/atom
-23.83081
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-23.8308
eV/atom
Volume/atom
14.93
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
1.1349
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.019000
μB/ų

Elastic Properties

KVRH
206.086
GPa
GVRH
107.967
GPa
Young's Modulus E
275.747
GPa
Poisson Ratio ν
0.277
Pugh Ratio K/G
1.909
Vickers Hardness Est.
11.522
GPa
Ductility
Brittle
Anisotropy
0.175
Lame λ
134.108
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Co · 0.500
Element Family
3d-TM
Solute Fraction
0.500
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0397
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.6442
J/mol·K
Ω Parameter
1.3969
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
13.340%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.2402
smaller = more stable mixing
VEC
6.250
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-10.012
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9464
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.674
Family
Co-based Alloy
Matrix Element
Co · 0.500

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.1750
Homogeneous Poisson ν
0.2770
Debye Temperature
413.7
K
Sound Velocity
3,422.9
m/s
Homogeneity
0.2770

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-864715
Reference Citation

The crystal structure and related material properties of HfInCo2 were obtained from the Materials Project database (MP-ID: mp-864715, 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_HfInCo2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.38817217
_cell_length_b   4.38697662
_cell_length_c   4.38929229
_cell_angle_alpha   59.97739693
_cell_angle_beta   59.95549978
_cell_angle_gamma   60.01837688
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfInCo2
_chemical_formula_sum   'Hf1 In1 Co2'
_cell_volume   59.72666120
_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
  Hf  Hf0  1  0.24999783  0.25000287  0.25000153  1.0
  In  In1  1  0.75000105  0.74999964  0.74999833  1.0
  Co  Co2  1  0.49987141  0.49991166  0.50005993  1.0
  Co  Co3  1  0.00012971  0.00008583  0.99994121  1.0
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