Eu(CuSn)2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1069357 · Space group: C2/m (#12)

Materials Project API

Basic Information

Formula

Eu(CuSn)2

MP-ID

mp-1069357

Elements

Sites

Density

7.9413

g/cm³

Volume

108.00

Å³

Cell a

5.9844

Cell b

5.9844

Cell c

4.7566

α Angle

72.59

β Angle

72.59

γ Angle

42.01

Space Group

C2/m

Point Group

2/m

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
16.75	5.2920	2.2	(1,1,0)
28.09	3.1771	66.4	(1,0,1)
29.88	2.9901	17.6	(1,1,-1)
31.76	2.8177	71.7	(1,0,-1)
32.87	2.7250	100.0	(2,1,0)
33.32	2.6888	67.1	(2,2,1)
33.88	2.6460	1.3	(2,2,0)
33.97	2.6389	10.2	(2,1,1)
38.07	2.3638	28.3	(1,1,2)
40.02	2.2528	14.3	(0,0,2)
42.12	2.1452	48.0	(1,-1,0)
42.82	2.1117	11.1	(2,1,-1)
43.63	2.0747	2.2	(2,2,2)
43.73	2.0699	15.1	(1,0,2)
44.95	2.0168	24.3	(2,2,-1)
45.45	1.9958	28.3	(2,1,2)
46.25	1.9629	4.8	(3,2,1)
47.92	1.8983	8.2	(3,2,0)
48.80	1.8661	25.1	(1,0,-2)
51.83	1.7640	2.4	(3,3,0)
52.50	1.7430	7.7	(2,0,-1)
53.44	1.7147	11.5	(3,2,2)
54.74	1.6769	32.8	(3,1,1)
54.86	1.6734	1.7	(3,3,2)

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Energy Properties

Formation Energy/atom

-0.36140

eV/atom

Energy/atom

-5.66253

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-22.3387

eV/atom

Volume/atom

21.60

Å³

c/a Ratio

0.7948

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

6.9155

μB

Mag. Ordering

Unknown

Mag. Sites

Magnetization/Volume

0.064030

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Cu · 0.400

Element Family

3d-TM

Solute Fraction

0.600

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0549

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

8.7706

J/mol·K

Ω Parameter

1.6531

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

14.068%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.2932

smaller = more stable mixing

VEC

7.400

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-5.120

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9602

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.606

Family

Cu-rich Multi-Component

Matrix Element

Cu · 0.400

Related Tasks

Related computation task IDs (5)

aaaciwid aaadrduc aaaektyi aaaeqxfz aaafcbdq

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1069357

Reference Citation

The crystal structure and related material properties of Eu(CuSn)2 were obtained from the Materials Project database (MP-ID: mp-1069357, 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_Eu(CuSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.98444366
_cell_length_b   5.98444366
_cell_length_c   4.75660312
_cell_angle_alpha   72.58923568
_cell_angle_beta   72.58923568
_cell_angle_gamma   42.01083813
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu(CuSn)2
_chemical_formula_sum   'Eu1 Cu2 Sn2'
_cell_volume   107.99595097
_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
  Eu  Eu0  1  0.00000000  0.00000000  -0.00000000  1.0
  Cu  Cu1  1  0.74214338  0.74214338  0.85591815  1.0
  Cu  Cu2  1  0.25785662  0.25785662  0.14408185  1.0
  Sn  Sn3  1  0.35901926  0.35901926  0.57185733  1.0
  Sn  Sn4  1  0.64098074  0.64098074  0.42814267  1.0

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