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Ho12InCo4Pt

High-Entropy Materials HEA

MP-ID: mp-3297639 · Space group: Immm (#71)

Basic Information

Formula
Ho12InCo4Pt
MP-ID
mp-3297639
Elements
4
Sites
18
Density
9.7133
g/cm³
Volume
431.63
ų
Cell a
8.2491
Å
Cell b
8.2491
Å
Cell c
8.2491
Å
α Angle
110.99
°
β Angle
110.15
°
γ Angle
107.29
°
Space Group
Immm
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic I
Stability
Yes
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
13.03 6.7940 3.5 (1,0,0)
13.10 6.7565 6.7 (0,1,0)
18.99 4.6727 1.0 (1,-1,-1)
23.10 3.8500 1.5 (0,1,1)
26.38 3.3783 2.8 (0,2,0)
26.38 3.3783 2.8 (2,0,-2)
26.84 3.3216 1.9 (0,0,2)
28.98 3.0815 16.8 (2,1,-1)
29.01 3.0780 10.3 (1,2,-1)
29.81 2.9970 19.9 (2,-1,1)
29.95 2.9837 1.9 (1,-1,2)
29.95 2.9837 1.9 (2,-2,1)
30.11 2.9682 8.3 (1,-2,-1)
30.21 2.9584 35.9 (1,-1,-2)
32.59 2.7476 100.0 (1,1,1)
32.59 2.7476 33.3 (3,-1,-1)
34.79 2.5787 7.2 (2,1,0)
34.88 2.5725 39.6 (1,2,0)
35.24 2.5470 59.5 (2,0,1)
35.59 2.5227 8.2 (1,0,2)
35.59 2.5227 24.7 (0,1,-3)
35.73 2.5131 9.7 (0,1,2)
35.73 2.5131 9.7 (2,-3,0)
36.76 2.4449 17.3 (2,2,-2)
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Energy Properties

Formation Energy/atom
-0.36885
eV/atom
Energy/atom
-29.34548
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-29.3455
eV/atom
Volume/atom
23.98
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
0.8187
μB
Mag. Ordering
FiM
Mag. Sites
16
Magnetization/Volume
0.001900
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ho · 0.667
Element Family
Lanthanide
Solute Fraction
0.333
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9257
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.6963
J/mol·K
Ω Parameter
23.9112
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
13.101%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3428
smaller = more stable mixing
VEC
10.056
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.543
kJ/mol; negative = exothermic mixing
Entropy Norm
0.6678
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3297639
Reference Citation

The crystal structure and related material properties of Ho12InCo4Pt were obtained from the Materials Project database (MP-ID: mp-3297639, 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_Ho12InCo4Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.24912386
_cell_length_b   8.24912394
_cell_length_c   8.24912394
_cell_angle_alpha   110.99437949
_cell_angle_beta   110.14996714
_cell_angle_gamma   107.29220734
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho12InCo4Pt
_chemical_formula_sum   'Ho12 In1 Co4 Pt1'
_cell_volume   431.62632135
_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
  Ho  Ho0  1  0.31601921  0.61883248  0.30281227  1.0
  Ho  Ho1  1  0.68398079  0.38116752  0.69718773  1.0
  Ho  Ho2  1  0.31601921  0.01320594  0.69718773  1.0
  Ho  Ho3  1  0.68398079  0.98679406  0.30281227  1.0
  Ho  Ho4  1  0.18488927  0.29179768  0.47668696  1.0
  Ho  Ho5  1  0.81511073  0.70820232  0.52331304  1.0
  Ho  Ho6  1  0.18488927  0.70820232  0.89309259  1.0
  Ho  Ho7  1  0.81511073  0.29179768  0.10690741  1.0
  Ho  Ho8  1  0.41258101  0.21360534  0.19897567  1.0
  Ho  Ho9  1  0.58741899  0.78639466  0.80102433  1.0
  Ho  Ho10  1  0.01462967  0.21360534  0.80102433  1.0
  Ho  Ho11  1  0.98537033  0.78639466  0.19897567  1.0
  In  In12  1  0.50000000  0.50000000  0.00000000  1.0
  Co  Co13  1  0.11062001  0.61062001  0.50000000  1.0
  Co  Co14  1  0.88937999  0.38937999  0.50000000  1.0
  Co  Co15  1  0.38223826  1.00000000  0.38223826  1.0
  Co  Co16  1  0.61776174  0.00000000  0.61776174  1.0
  Pt  Pt17  1  0.00000000  0.00000000  0.00000000  1.0
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