Tm2CuPt

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-865317 · Space group: Fm-3m (#225)

Materials Project API

Basic Information

Formula

Tm2CuPt

MP-ID

mp-865317

Elements

Sites

Density

12.5689

g/cm³

Volume

78.81

Å³

Cell a

4.8124

Cell b

4.8124

Cell c

4.8124

α Angle

60.00

β Angle

60.00

γ Angle

60.00

Space Group

Fm-3m

Point Group

m-3m

Crystal System

Cubic

Bravais Lattice

Stability

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 10)

2θ	d (Å)	I	hkl
22.63	3.9293	9.8	(1,1,1)
26.19	3.4029	2.0	(1,1,0)
37.37	2.4062	100.0	(2,1,1)
44.13	2.0520	5.4	(2,2,1)
53.89	1.7014	17.5	(2,2,0)
59.18	1.5613	2.4	(3,2,2)
67.41	1.3892	35.5	(3,3,2)
72.12	1.3098	1.8	(3,3,3)
79.70	1.2031	11.1	(4,2,2)
84.16	1.1504	1.9	(4,3,2)

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Energy Properties

Formation Energy/atom

-0.88234

eV/atom

Energy/atom

-34.02649

eV/atom

Energy above Hull

0.0152

eV/atom

Uncorrected Energy

-34.0265

eV/atom

Volume/atom

19.70

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

Tm · 0.500

Element Family

Lanthanide

Solute Fraction

0.500

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0397

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

8.6442

J/mol·K

Ω Parameter

3.3785

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

13.686%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.4410

smaller = more stable mixing

VEC

11.750

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-4.500

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9464

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.499

Family

Tm-rich Multi-Component

Matrix Element

Tm · 0.500

Related Tasks

Related computation task IDs (5)

aaachwzl aaadupwf aaaegxjd aaaetfcf aaafsmwp

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-865317

Reference Citation

The crystal structure and related material properties of Tm2CuPt were obtained from the Materials Project database (MP-ID: mp-865317, 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_Tm2CuPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.81236365
_cell_length_b   4.81236365
_cell_length_c   4.81236365
_cell_angle_alpha   60.00000000
_cell_angle_beta   60.00000000
_cell_angle_gamma   60.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tm2CuPt
_chemical_formula_sum   'Tm2 Cu1 Pt1'
_cell_volume   78.80618704
_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
  Tm  Tm0  1  -0.00000000  0.00000000  0.00000000  1.0
  Tm  Tm1  1  0.50000000  0.50000000  0.50000000  1.0
  Cu  Cu2  1  0.25000100  0.25000100  0.25000100  1.0
  Pt  Pt3  1  0.75000000  0.75000000  0.75000000  1.0

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