Ho3InN

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-31057 · Space group: Pm-3m (#221)

Materials Project API

Basic Information

Formula

Ho3InN

MP-ID

mp-31057

Elements

Sites

Density

9.5875

g/cm³

Volume

108.01

Å³

Cell a

4.7623

Cell b

4.7623

Cell c

4.7623

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pm-3m

Point Group

m-3m

Crystal System

Cubic

Bravais Lattice

Stability

Yes

Packing Fraction

0.5236

X-ray Diffraction

Diffraction Pattern

Target / Radiation

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

Diffraction Peaks (Top 9)

2θ	d (Å)	I	hkl
18.63	4.7623	3.1	(1,0,0)
32.57	2.7495	100.0	(1,1,1)
37.78	2.3812	54.9	(2,0,0)
42.44	2.1298	1.4	(2,1,0)
54.50	1.6837	37.8	(2,2,0)
64.94	1.4359	41.5	(3,1,1)
68.22	1.3748	12.7	(2,2,2)
80.71	1.1906	6.0	(4,0,0)
89.76	1.0926	18.1	(3,3,1)

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Energy Properties

Formation Energy/atom

-1.06709

eV/atom

Energy/atom

-6.04518

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-27.2792

eV/atom

Volume/atom

21.60

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

0.0000

μB

Mag. Ordering

Unknown

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 · 0.600

Element Family

Lanthanide

Solute Fraction

0.400

Interstitial Fraction

0.200

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.9503

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.9005

J/mol·K

Ω Parameter

1.3157

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

25.634%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.7021

smaller = more stable mixing

VEC

8.200

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-6.839

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8650

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.574

Family

Interstitial Alloy

Matrix Element

Ho · 0.600

Related Tasks

Related computation task IDs (5)

aaadmkkr aaadsyqa aaaegrlw aaaeuknf aaafbyvm

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-31057

Reference Citation

The crystal structure and related material properties of Ho3InN were obtained from the Materials Project database (MP-ID: mp-31057, 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_Ho3InN
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.76233324
_cell_length_b   4.76233324
_cell_length_c   4.76233324
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho3InN
_chemical_formula_sum   'Ho3 In1 N1'
_cell_volume   108.00885061
_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  0.50000000  0.50000000  -0.00000000  1.0
  Ho  Ho1  1  -0.00000000  0.50000000  0.50000000  1.0
  Ho  Ho2  1  0.50000000  0.00000000  0.50000000  1.0
  In  In3  1  -0.00000000  0.00000000  -0.00000000  1.0
  N  N4  1  0.50000000  0.50000000  0.50000000  1.0

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