EuFe2

Traditional Materials TRA

MP-ID: mp-1101922 · Space group: P6_3/mmc (#194)

Materials Project API

Basic Information

Formula

EuFe2

MP-ID

mp-1101922

Elements

Sites

Density

7.8273

g/cm³

Volume

223.73

Å³

Cell a

5.5013

Cell b

5.5013

Cell c

8.5363

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

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 24)

2θ	d (Å)	I	hkl
18.62	4.7643	3.1	(1,0,-1,0)
20.81	4.2681	8.1	(0,0,0,2)
21.36	4.1602	11.9	(1,0,-1,1)
28.07	3.1790	25.3	(1,0,-1,2)
32.55	2.7507	69.5	(2,-1,-1,0)
36.79	2.4429	74.7	(1,0,-1,3)
37.76	2.3821	14.7	(2,0,-2,0)
38.95	2.3121	100.0	(2,-1,-1,2)
39.27	2.2945	47.8	(2,0,-2,1)
42.35	2.1341	8.5	(0,0,0,4)
46.64	1.9476	4.4	(1,0,-1,4)
49.93	1.8265	3.7	(2,0,-2,3)
50.70	1.8007	5.3	(3,-1,-2,0)
57.33	1.6072	13.8	(1,0,-1,5)
58.08	1.5881	12.0	(3,0,-3,0)
59.18	1.5613	1.5	(3,0,-3,1)
60.88	1.5216	43.1	(3,-1,-2,3)
62.39	1.4884	26.2	(3,0,-3,2)
65.62	1.4227	2.4	(0,0,0,6)
67.50	1.3877	26.4	(2,0,-2,5)
68.19	1.3753	20.5	(4,-2,-2,0)
68.88	1.3632	1.3	(1,0,-1,6)
72.16	1.3090	3.2	(4,-2,-2,2)
72.37	1.3058	1.9	(4,-1,-3,1)

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Energy Properties

Formation Energy/atom

0.34370

eV/atom

Energy/atom

-8.73235

eV/atom

Energy above Hull

0.3437

eV/atom

Uncorrected Energy

-8.7324

eV/atom

Volume/atom

18.64

Å³

c/a Ratio

1.5517

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

46.6369

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.208450

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Fe · 0.667

Element Family

N/A

Solute Fraction

0.333

Interstitial Fraction

0.000

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.588

Family

Fe-rich Alloy

Matrix Element

Fe · 0.667

Related Tasks

Related computation task IDs (1)

aaaeiwtc

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1101922

Reference Citation

The crystal structure and related material properties of EuFe2 were obtained from the Materials Project database (MP-ID: mp-1101922, 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_EuFe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.50130400
_cell_length_b   5.50130398
_cell_length_c   8.53626600
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00000009
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuFe2
_chemical_formula_sum   'Eu4 Fe8'
_cell_volume   223.73290360
_cell_formula_units_Z   4
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  0.33333300  0.66666700  0.44265700  1.0
  Eu  Eu1  1  0.66666700  0.33333300  0.55734300  1.0
  Eu  Eu2  1  0.66666700  0.33333300  0.94265700  1.0
  Eu  Eu3  1  0.33333300  0.66666700  0.05734300  1.0
  Fe  Fe4  1  0.00000000  0.00000000  0.50000000  1.0
  Fe  Fe5  1  0.00000000  0.00000000  0.00000000  1.0
  Fe  Fe6  1  0.85285800  0.14714200  0.25000000  1.0
  Fe  Fe7  1  0.85285800  0.70571700  0.25000000  1.0
  Fe  Fe8  1  0.29428300  0.14714200  0.25000000  1.0
  Fe  Fe9  1  0.14714200  0.85285800  0.75000000  1.0
  Fe  Fe10  1  0.14714200  0.29428300  0.75000000  1.0
  Fe  Fe11  1  0.70571700  0.85285800  0.75000000  1.0

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