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Ho5RuWC7

High-Entropy Materials HEA

MP-ID: mp-3291846 · Space group: Amm2 (#38)

Basic Information

Formula
Ho5RuWC7
MP-ID
mp-3291846
Elements
4
Sites
14
Density
10.0289
g/cm³
Volume
197.64
ų
Cell a
8.2466
Å
Cell b
8.2466
Å
Cell c
3.4401
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
122.35
°
Space Group
Amm2
Point Group
mm2
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic P
Stability
Yes
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
12.25 7.2249 9.3 (1,-1,0,0)
12.71 6.9666 15.2 (1,0,-1,0)
21.57 4.1198 3.5 (2,-1,-1,0)
22.36 3.9759 1.7 (1,1,-2,0)
24.64 3.6125 9.9 (2,-2,0,0)
25.90 3.4401 3.0 (0,0,0,1)
28.95 3.0845 33.6 (1,0,-1,1)
32.98 2.7161 28.1 (3,-2,-1,0)
33.52 2.6737 77.0 (3,-1,-2,0)
33.95 2.6406 6.8 (2,-1,-1,1)
34.40 2.6071 35.9 (2,1,-3,0)
34.48 2.6015 93.5 (1,1,-2,1)
36.05 2.4912 100.0 (2,-2,0,1)
36.72 2.4476 2.0 (2,0,-2,1)
37.34 2.4083 2.9 (3,-3,0,0)
38.78 2.3222 12.1 (3,0,-3,0)
42.40 2.1318 5.7 (2,-3,1,1)
42.40 2.1318 5.7 (3,-2,-1,1)
42.84 2.1111 3.0 (1,-3,2,1)
42.84 2.1111 3.0 (3,-1,-2,1)
43.56 2.0778 1.5 (2,1,-3,1)
45.39 1.9980 3.7 (4,-3,-1,0)
45.63 1.9880 14.0 (2,2,-4,0)
47.22 1.9247 12.5 (3,0,-3,1)
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Energy Properties

Formation Energy/atom
-0.50594
eV/atom
Energy/atom
-22.70806
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-22.7081
eV/atom
Volume/atom
14.12
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0022
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000010
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
C · 0.500
Element Family
Metalloid-Nonmetal
Solute Fraction
0.500
Interstitial Fraction
0.500

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0913
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.0731
J/mol·K
Ω Parameter
2.1857
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
37.523%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.6112
smaller = more stable mixing
VEC
6.929
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-12.374
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7872
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291846
Reference Citation

The crystal structure and related material properties of Ho5RuWC7 were obtained from the Materials Project database (MP-ID: mp-3291846, 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_Ho5RuWC7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.24663974
_cell_length_b   8.24664012
_cell_length_c   3.44007834
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   122.35148919
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho5RuWC7
_chemical_formula_sum   'Ho5 Ru1 W1 C7'
_cell_volume   197.63628679
_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  0.50223860  0.49776140  0.00000000  1.0
  Ho  Ho1  1  0.07264148  0.33371443  0.50000000  1.0
  Ho  Ho2  1  0.92174451  0.66166346  0.50000000  1.0
  Ho  Ho3  1  0.66628557  0.92735852  0.50000000  1.0
  Ho  Ho4  1  0.33833654  0.07825549  0.50000000  1.0
  Ru  Ru5  1  0.71108109  0.28891891  0.00000000  1.0
  W  W6  1  0.28662950  0.71337050  0.00000000  1.0
  C  C7  1  0.62983580  0.37016420  0.50000000  1.0
  C  C8  1  0.37686817  0.62313183  0.50000000  1.0
  C  C9  1  0.99887636  0.00112364  0.00000000  1.0
  C  C10  1  0.16874662  0.17052013  0.00000000  1.0
  C  C11  1  0.82947987  0.83125338  0.00000000  1.0
  C  C12  1  0.00072379  0.50348690  0.00000000  1.0
  C  C13  1  0.49651310  0.99927621  0.00000000  1.0
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