Eu9Dy(Sn3H)2

High-Entropy Materials HEA

MP-ID: mp-3292488 · Space group: I4/m (#87)

Materials Project API

Basic Information

Formula

Eu9Dy(Sn3H)2

MP-ID

mp-3292488

Elements

Sites

Density

7.0070

g/cm³

Volume

531.90

Å³

Cell a

9.6527

Cell b

9.6527

Cell c

9.6527

α Angle

128.78

β Angle

128.78

γ Angle

75.36

Space Group

I4/m

Point Group

4/m

Crystal System

Tetragonal

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
11.58	7.6395	2.1	(1,1,-1)
24.31	3.6616	3.7	(2,0,0)
24.56	3.6251	2.7	(1,0,1)
24.56	3.6251	1.7	(1,0,-2)
27.82	3.2065	14.2	(2,2,-1)
29.68	3.0101	100.0	(2,1,0)
29.68	3.0101	13.1	(0,3,-1)
30.30	2.9501	12.1	(0,0,2)
31.76	2.8173	23.7	(3,1,-1)
31.76	2.8173	7.9	(1,3,-1)
33.98	2.6387	14.1	(1,-1,2)
33.98	2.6387	39.3	(2,-2,1)
35.24	2.5465	14.8	(3,3,-3)
38.06	2.3642	2.8	(2,3,-1)
38.50	2.3380	3.5	(3,3,-2)
38.56	2.3348	1.6	(4,0,-2)
39.38	2.2882	3.0	(1,0,2)
41.55	2.1736	2.0	(4,2,-4)
41.60	2.1710	2.1	(3,1,-4)
42.93	2.1069	3.6	(4,-1,-1)
43.38	2.0861	1.2	(2,-2,2)
43.38	2.0861	1.2	(2,-2,-2)
45.20	2.0062	2.2	(2,-1,2)
45.20	2.0062	2.2	(2,-3,2)

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Energy Properties

Formation Energy/atom

-0.79342

eV/atom

Energy/atom

-30.46326

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-30.4633

eV/atom

Volume/atom

29.55

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

62.0002

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.116560

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Eu · 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

1.1175

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.2908

J/mol·K

Ω Parameter

0.0000

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

31.243%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.4124

smaller = more stable mixing

VEC

5.500

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

0.000

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8061

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaahfioe

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-3292488

Reference Citation

The crystal structure and related material properties of Eu9Dy(Sn3H)2 were obtained from the Materials Project database (MP-ID: mp-3292488, 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_Eu9Dy(Sn3H)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.65266438
_cell_length_b   9.65266293
_cell_length_c   9.65266343
_cell_angle_alpha   128.78269182
_cell_angle_beta   128.78268258
_cell_angle_gamma   75.36048488
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu9Dy(Sn3H)2
_chemical_formula_sum   'Eu9 Dy1 Sn6 H2'
_cell_volume   531.90017222
_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  0.50000000  0.50000000  0.00000000  1.0
  Eu  Eu1  1  0.51284910  0.01287433  0.82805842  1.0
  Eu  Eu2  1  0.18481591  0.68479068  0.17194158  1.0
  Eu  Eu3  1  0.01287433  0.18481591  0.50002523  1.0
  Eu  Eu4  1  0.68479068  0.51284910  0.49997477  1.0
  Eu  Eu5  1  0.48715090  0.98712567  0.17194158  1.0
  Eu  Eu6  1  0.81518409  0.31520932  0.82805842  1.0
  Eu  Eu7  1  0.98712567  0.81518409  0.49997477  1.0
  Eu  Eu8  1  0.31520932  0.48715090  0.50002523  1.0
  Dy  Dy9  1  0.00000000  0.00000000  0.00000000  1.0
  Sn  Sn10  1  0.24450578  0.24450578  0.00000000  1.0
  Sn  Sn11  1  0.75549422  0.75549422  1.00000000  1.0
  Sn  Sn12  1  0.88007985  0.36738257  0.24746441  1.0
  Sn  Sn13  1  0.11992015  0.63261743  0.75253559  1.0
  Sn  Sn14  1  0.36738257  0.11992015  0.48730272  1.0
  Sn  Sn15  1  0.63261743  0.88007985  0.51269728  1.0
  H  H16  1  0.25000000  0.75000000  0.50000000  1.0
  H  H17  1  0.75000000  0.25000000  0.50000000  1.0

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