EuEr
Traditional Materials TRAMP-ID: mp-1183921 · Space group: P-6m2 (#187)
Basic Information
Formula
EuEr
MP-ID
mp-1183921
Elements
2
Sites
2
Density
7.5471
g/cm³
Volume
70.24
ų
Cell a
3.6601
Å
Cell b
3.6601
Å
Cell c
6.0540
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P-6m2
Point Group
-6m2
Crystal System
Hexagonal
Bravais Lattice
hP
Stability
No
Packing Fraction
0.7405
X-ray Diffraction
Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 24)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 28.15 | 3.1697 | 34.5 | (1,0,-1,0) |
| 29.51 | 3.0270 | 40.7 | (0,0,0,2) |
| 31.87 | 2.8081 | 100.0 | (1,0,-1,1) |
| 31.87 | 2.8081 | 50.0 | (1,-1,0,1) |
| 41.24 | 2.1891 | 24.9 | (1,0,-1,2) |
| 49.83 | 1.8301 | 9.6 | (1,1,-2,0) |
| 49.83 | 1.8301 | 19.1 | (2,-1,-1,0) |
| 53.86 | 1.7023 | 34.2 | (1,0,-1,3) |
| 58.21 | 1.5849 | 3.0 | (2,0,-2,0) |
| 58.21 | 1.5849 | 1.5 | (2,-2,0,0) |
| 58.98 | 1.5661 | 11.5 | (1,1,-2,2) |
| 58.98 | 1.5661 | 23.1 | (2,-1,-1,2) |
| 60.37 | 1.5332 | 16.2 | (2,0,-2,1) |
| 60.37 | 1.5332 | 8.1 | (2,-2,0,1) |
| 61.24 | 1.5135 | 5.2 | (0,0,0,4) |
| 66.61 | 1.4041 | 4.0 | (2,0,-2,2) |
| 66.61 | 1.4041 | 2.0 | (2,-2,0,2) |
| 68.73 | 1.3658 | 5.5 | (1,0,-1,4) |
| 76.41 | 1.2464 | 8.2 | (2,0,-2,3) |
| 76.41 | 1.2464 | 4.1 | (2,-2,0,3) |
| 80.10 | 1.1981 | 1.2 | (2,1,-3,0) |
| 80.10 | 1.1981 | 2.4 | (3,-1,-2,0) |
| 81.98 | 1.1753 | 6.9 | (2,1,-3,1) |
| 81.98 | 1.1753 | 6.9 | (3,-1,-2,1) |
Energy Properties
Formation Energy/atom
0.10107
eV/atom
Energy/atom
-36.12208
eV/atom
Energy above Hull
0.1011
eV/atom
Uncorrected Energy
-7.3113
eV/atom
Volume/atom
35.12
ų
c/a Ratio
1.6541
Electronic Properties
Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV
Magnetic Properties
Magnetic
Yes
Total Mag. Moment
7.7071
μB
Mag. Ordering
FM
Mag. Sites
2
Magnetization/Volume
0.109730
μB/ų
Elastic Properties
Elastic data not available
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Eu · 0.500
Element Family
N/A
Solute Fraction
0.500
Interstitial Fraction
0.000
Traditional Material Features
ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.477
Family
Binary Alloy
Matrix Element
Eu · 0.500
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-1183921
Reference Citation
The crystal structure and related material properties of EuEr were obtained from the Materials Project database (MP-ID: mp-1183921, 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_EuEr
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 3.66009950
_cell_length_b 3.66009950
_cell_length_c 6.05402500
_cell_angle_alpha 90.00000000
_cell_angle_beta 90.00000000
_cell_angle_gamma 119.99999091
_symmetry_Int_Tables_number 1
_chemical_formula_structural EuEr
_chemical_formula_sum 'Eu1 Er1'
_cell_volume 70.23614465
_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
Er Er1 1 0.33333300 0.66666700 0.50000000 1.0
