HoSnPt

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-30733 · Space group: P-62m (#189)

Materials Project API

Basic Information

Formula

HoSnPt

MP-ID

mp-30733

Elements

Sites

Density

12.4047

g/cm³

Volume

192.25

Å³

Cell a

7.4502

Cell b

7.4502

Cell c

3.9995

α Angle

90.00

β Angle

90.00

γ Angle

120.00

Space Group

P-62m

Point Group

-6m2

Crystal System

Hexagonal

Bravais Lattice

Stability

Yes

Packing Fraction

0.7405

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
23.89	3.7251	13.2	(2,-1,-1,0)
26.22	3.3994	10.1	(1,0,-1,1)
27.65	3.2260	4.3	(2,0,-2,0)
32.86	2.7259	84.7	(2,-1,-1,1)
35.76	2.5110	100.0	(2,0,-2,1)
36.86	2.4387	32.9	(3,-1,-2,0)
42.01	2.1507	32.5	(3,0,-3,0)
42.01	2.1507	16.3	(3,-3,0,0)
43.46	2.0821	38.3	(3,-1,-2,1)
45.35	1.9997	28.4	(0,0,0,2)
48.03	1.8942	1.1	(3,0,-3,1)
48.90	1.8626	7.6	(4,-2,-2,0)
51.04	1.7895	6.2	(4,-1,-3,0)
51.04	1.7895	3.1	(4,-3,-1,0)
51.90	1.7619	3.3	(2,-1,-1,2)
53.95	1.6997	1.3	(2,0,-2,2)
54.33	1.6884	3.2	(4,-2,-2,1)
56.32	1.6334	10.0	(4,-1,-3,1)
57.10	1.6130	1.2	(4,0,-4,0)
59.81	1.5463	5.5	(2,1,-3,2)
59.81	1.5463	11.0	(3,-1,-2,2)
62.77	1.4802	1.5	(5,-2,-3,0)
63.53	1.4645	29.2	(3,0,-3,2)
66.40	1.4080	8.8	(5,-1,-4,0)

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Energy Properties

Formation Energy/atom

-1.08389

eV/atom

Energy/atom

-5.97669

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-37.5713

eV/atom

Volume/atom

21.36

Å³

c/a Ratio

0.5368

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 · 0.333

Element Family

Lanthanide

Solute Fraction

0.667

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0986

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.1339

J/mol·K

Ω Parameter

3.4169

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

9.656%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.4394

smaller = more stable mixing

VEC

8.333

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-3.814

kJ/mol; negative = exothermic mixing

Entropy Norm

1.0000

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.430

Family

Ho-rich Multi-Component

Matrix Element

Ho · 0.333

Related Tasks

Related computation task IDs (5)

aaadnddt aaadsycp aaaemfyn aaaetzpp aaafixqa

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-30733

Reference Citation

The crystal structure and related material properties of HoSnPt were obtained from the Materials Project database (MP-ID: mp-30733, 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_HoSnPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.45022232
_cell_length_b   7.45022232
_cell_length_c   3.99946054
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999546
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HoSnPt
_chemical_formula_sum   'Ho3 Sn3 Pt3'
_cell_volume   192.25185245
_cell_formula_units_Z   3
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  0.40544015  0.40544015  0.50000000  1.0
  Ho  Ho1  1  0.59455985  0.00000000  0.50000000  1.0
  Ho  Ho2  1  0.00000000  0.59455985  0.50000000  1.0
  Sn  Sn3  1  0.00000000  0.25926425  0.00000000  1.0
  Sn  Sn4  1  0.74073575  0.74073575  -0.00000000  1.0
  Sn  Sn5  1  0.25926425  0.00000000  0.00000000  1.0
  Pt  Pt6  1  0.66666700  0.33333300  0.00000000  1.0
  Pt  Pt7  1  0.00000000  0.00000000  0.50000000  1.0
  Pt  Pt8  1  0.33333300  0.66666700  -0.00000000  1.0

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