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Eu3Er

Traditional Materials TRA

MP-ID: mp-1184396 · Space group: P6_3/mmc (#194)

Materials Project API

Basic Information

Formula
Eu3Er
MP-ID
mp-1184396
Elements
2
Sites
8
Density
6.6201
g/cm³
Volume
312.61
ų
Cell a
7.6559
Å
Cell b
7.6559
Å
Cell c
6.1587
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P6_3/mmc
Point Group
6/mmm
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 21)
2θd (Å)Ihkl
26.89 3.3151 23.2 (2,0,-2,0)
29.00 3.0794 25.6 (0,0,0,2)
30.63 2.9191 100.0 (2,0,-2,1)
39.96 2.2562 16.3 (2,0,-2,2)
47.51 1.9140 6.6 (2,2,-4,0)
47.51 1.9140 13.1 (4,-2,-2,0)
52.42 1.7454 22.2 (2,0,-2,3)
55.43 1.6575 3.1 (4,0,-4,0)
56.62 1.6256 23.3 (4,-2,-2,2)
57.59 1.6006 16.6 (4,0,-4,1)
60.09 1.5397 3.3 (0,0,0,4)
63.77 1.4595 4.1 (4,0,-4,2)
67.02 1.3964 3.5 (2,0,-2,4)
73.42 1.2897 8.1 (4,0,-4,3)
75.94 1.2530 2.5 (6,-2,-4,0)
77.79 1.2278 13.8 (6,-2,-4,1)
79.97 1.1997 8.7 (4,-2,-2,4)
83.25 1.1606 3.9 (6,-2,-4,2)
83.78 1.1546 5.9 (2,0,-2,5)
86.22 1.1281 1.8 (4,0,-4,4)
88.48 1.1050 3.4 (6,0,-6,0)
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Energy Properties

Formation Energy/atom
0.08188
eV/atom
Energy/atom
-37.29014
eV/atom
Energy above Hull
0.0819
eV/atom
Uncorrected Energy
-8.7528
eV/atom
Volume/atom
39.08
ų
c/a Ratio
0.8045

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
45.3297
μB
Mag. Ordering
FM
Mag. Sites
8
Magnetization/Volume
0.145000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Eu · 0.750
Element Family
N/A
Solute Fraction
0.250
Interstitial Fraction
0.000

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.587
Family
Binary Alloy
Matrix Element
Eu · 0.750

Related Tasks

Related computation task IDs (2)
aaadvdkz aaadzeae

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1184396
Reference Citation

The crystal structure and related material properties of Eu3Er were obtained from the Materials Project database (MP-ID: mp-1184396, 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…

Style: Ball & Stick
Raw CIF Data 
# generated using pymatgen
data_Eu3Er
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.65584589
_cell_length_b   7.65584589
_cell_length_c   6.15874000
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999908
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu3Er
_chemical_formula_sum   'Eu6 Er2'
_cell_volume   312.61432252
_cell_formula_units_Z   2
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  0.16991000  0.33982000  0.25000000  1.0
  Eu  Eu1  1  0.66018000  0.83009000  0.25000000  1.0
  Eu  Eu2  1  0.16991000  0.83009000  0.25000000  1.0
  Eu  Eu3  1  0.83009000  0.66018000  0.75000000  1.0
  Eu  Eu4  1  0.33982000  0.16991000  0.75000000  1.0
  Eu  Eu5  1  0.83009000  0.16991000  0.75000000  1.0
  Er  Er6  1  0.33333300  0.66666700  0.75000000  1.0
  Er  Er7  1  0.66666700  0.33333300  0.25000000  1.0
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