Ho5RuRh

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-3295133 · Space group: C2 (#5)

Materials Project API

Basic Information

Formula

Ho5RuRh

MP-ID

mp-3295133

Elements

Sites

Density

9.6657

g/cm³

Volume

353.43

Å³

Cell a

6.3365

Cell b

7.1643

Cell c

8.4626

α Angle

96.66

β Angle

111.99

γ Angle

90.00

Space Group

Point Group

Crystal System

Monoclinic

Bravais Lattice

Stability

Yes

Packing Fraction

X-ray Diffraction

Diffraction Pattern

Target / Radiation

X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å

Diffraction Peaks (Top 24)

2θ	d (Å)	I	hkl
11.37	7.7854	1.2	(0,0,1)
15.10	5.8691	2.2	(1,0,0)
20.07	4.4244	15.8	(1,1,0)
25.06	3.5540	3.0	(0,2,0)
26.23	3.3977	1.2	(0,2,-1)
26.53	3.3595	7.9	(1,1,1)
28.17	3.1682	4.8	(2,0,-1)
28.75	3.1057	39.6	(1,2,-1)
28.89	3.0903	18.9	(0,2,1)
30.00	2.9785	12.8	(1,2,0)
30.46	2.9346	4.3	(2,0,0)
30.90	2.8938	74.7	(2,1,-1)
31.90	2.8053	37.7	(0,2,-2)
31.97	2.7991	45.7	(1,2,-2)
32.02	2.7949	100.0	(1,0,2)
32.45	2.7588	33.8	(2,-1,0)
33.10	2.7066	25.3	(1,-1,2)
33.58	2.6685	38.6	(2,1,0)
34.56	2.5952	14.6	(0,0,3)
35.31	2.5419	41.5	(1,2,1)
35.82	2.5069	41.2	(1,1,2)
36.30	2.4750	33.1	(0,2,2)
36.57	2.4572	28.6	(2,0,1)
37.78	2.3812	11.7	(2,-1,1)

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Energy Properties

Formation Energy/atom

-0.53269

eV/atom

Energy/atom

-31.09947

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-31.0995

eV/atom

Volume/atom

25.25

Å³

c/a Ratio

1.3355

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Total Mag. Moment

0.0001

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.000000

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Ho · 0.714

Element Family

Lanthanide

Solute Fraction

0.286

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.7963

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

6.6205

J/mol·K

Ω Parameter

0.0000

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

11.343%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.4568

smaller = more stable mixing

VEC

10.286

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

0.000

kJ/mol; negative = exothermic mixing

Entropy Norm

0.7248

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.656

Family

Ho-rich Multi-Component

Matrix Element

Ho · 0.714

Related Tasks

Related computation task IDs (1)

aaahfmlx

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-3295133

Reference Citation

The crystal structure and related material properties of Ho5RuRh were obtained from the Materials Project database (MP-ID: mp-3295133, 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

Loading 3D structure…

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Raw CIF Data

# generated using pymatgen
data_Ho5RuRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.33646779
_cell_length_b   7.16429823
_cell_length_c   8.46256292
_cell_angle_alpha   96.66314561
_cell_angle_beta   111.98613810
_cell_angle_gamma   89.99999753
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho5RuRh
_chemical_formula_sum   'Ho10 Ru2 Rh2'
_cell_volume   353.43055361
_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
  Ho  Ho0  1  0.98282879  0.91460370  0.18941764  1.0
  Ho  Ho1  1  0.79341115  0.58539630  0.81058236  1.0
  Ho  Ho2  1  0.02272713  0.08706766  0.81386939  1.0
  Ho  Ho3  1  0.20885874  0.41293234  0.18613061  1.0
  Ho  Ho4  1  0.64542047  0.81618585  0.43322646  1.0
  Ho  Ho5  1  0.21219300  0.68381415  0.56677354  1.0
  Ho  Ho6  1  0.35006601  0.18721535  0.56370158  1.0
  Ho  Ho7  1  0.78636543  0.31278465  0.43629842  1.0
  Ho  Ho8  1  0.42317094  0.75000000  1.00000000  1.0
  Ho  Ho9  1  0.57641607  0.25000000  0.00000000  1.0
  Ru  Ru10  1  0.17433215  0.42743383  0.78026661  1.0
  Ru  Ru11  1  0.39406453  0.07256617  0.21973339  1.0
  Rh  Rh12  1  0.82597281  0.57372813  0.22180203  1.0
  Rh  Rh13  1  0.60417178  0.92627187  0.77819797  1.0

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