K3Eu

Traditional Materials TRA

MP-ID: mp-1185259 · Space group: P6_3/mmc (#194)

Materials Project API

Basic Information

Formula

K3Eu

MP-ID

mp-1185259

Elements

Sites

Density

1.6492

g/cm³

Volume

542.22

Å³

Cell a

9.1696

Cell b

9.1696

Cell c

7.4465

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
11.14	7.9411	5.7	(1,-1,0,0)
11.14	7.9411	11.4	(1,0,-1,0)
16.32	5.4319	41.6	(1,0,-1,1)
19.36	4.5848	19.4	(2,-1,-1,0)
22.39	3.9705	22.9	(2,0,-2,0)
23.90	3.7232	26.0	(0,0,0,2)
25.42	3.5036	100.0	(2,0,-2,1)
26.44	3.3711	5.0	(1,0,-1,2)
29.77	3.0014	2.1	(3,-1,-2,0)
29.77	3.0014	1.1	(2,1,-3,0)
30.94	2.8902	12.9	(2,-1,-1,2)
32.15	2.7838	18.3	(3,-1,-2,1)
32.98	2.7160	16.7	(2,0,-2,2)
33.86	2.6470	5.1	(3,0,-3,0)
37.98	2.3691	5.6	(1,0,-1,3)
38.53	2.3367	3.3	(3,-1,-2,2)
39.30	2.2924	20.1	(4,-2,-2,0)
40.98	2.2025	1.6	(4,-1,-3,0)
41.87	2.1574	5.9	(3,0,-3,2)
42.82	2.1120	8.2	(4,-1,-3,1)
42.97	2.1047	23.1	(2,0,-2,3)
45.70	1.9853	1.1	(4,-4,0,0)
45.70	1.9853	2.1	(4,0,-4,0)
46.52	1.9521	24.2	(4,-2,-2,2)

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Energy Properties

Formation Energy/atom

0.18587

eV/atom

Energy/atom

-13.95804

eV/atom

Energy above Hull

0.1859

eV/atom

Uncorrected Energy

-3.2112

eV/atom

Volume/atom

67.78

Å³

c/a Ratio

0.8121

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

15.3431

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.028300

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

K · 0.750

Element Family

N/A

Solute Fraction

0.250

Interstitial Fraction

0.000

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.517

Family

Binary Alloy

Matrix Element

K · 0.750

Related Tasks

Related computation task IDs (1)

aaaefokb

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1185259

Reference Citation

The crystal structure and related material properties of K3Eu were obtained from the Materials Project database (MP-ID: mp-1185259, 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_K3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.16956232
_cell_length_b   9.16956232
_cell_length_c   7.44648700
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00000229
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K3Eu
_chemical_formula_sum   'K6 Eu2'
_cell_volume   542.22466620
_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
  K  K0  1  0.16838900  0.33677800  0.25000000  1.0
  K  K1  1  0.66322200  0.83161100  0.25000000  1.0
  K  K2  1  0.16838900  0.83161100  0.25000000  1.0
  K  K3  1  0.83161100  0.66322200  0.75000000  1.0
  K  K4  1  0.33677800  0.16838900  0.75000000  1.0
  K  K5  1  0.83161100  0.16838900  0.75000000  1.0
  Eu  Eu6  1  0.33333300  0.66666700  0.75000000  1.0
  Eu  Eu7  1  0.66666700  0.33333300  0.25000000  1.0

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