K
Traditional Materials TRA Elasticity Data ELAMP-ID: mp-10157 · Space group: Fm-3m (#225)
Basic Information
Formula
K
MP-ID
mp-10157
Elements
1
Sites
1
Density
0.8319
g/cm³
Volume
78.05
ų
Cell a
4.7968
Å
Cell b
4.7968
Å
Cell c
4.7968
Å
α Angle
60.00
°
β Angle
60.00
°
γ Angle
60.00
°
Space Group
Fm-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
cF
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 |
|---|---|---|---|
| 22.70 | 3.9166 | 33.3 | (0,0,1) |
| 22.70 | 3.9166 | 100.0 | (1,0,0) |
| 26.27 | 3.3919 | 68.2 | (1,1,0) |
| 37.50 | 2.3984 | 24.3 | (1,0,-1) |
| 37.50 | 2.3984 | 24.3 | (2,1,1) |
| 44.28 | 2.0454 | 19.0 | (1,1,-1) |
| 44.28 | 2.0454 | 38.0 | (2,2,1) |
| 46.37 | 1.9583 | 12.3 | (2,0,0) |
| 46.37 | 1.9583 | 4.1 | (0,2,0) |
| 54.07 | 1.6959 | 7.3 | (2,2,0) |
| 59.39 | 1.5563 | 8.9 | (2,0,-1) |
| 59.39 | 1.5563 | 12.5 | (3,1,1) |
| 61.09 | 1.5169 | 13.0 | (2,1,-1) |
| 61.09 | 1.5169 | 6.5 | (2,3,1) |
| 67.66 | 1.3847 | 5.8 | (1,1,-2) |
| 67.66 | 1.3847 | 8.1 | (2,-1,-1) |
| 72.39 | 1.3055 | 1.8 | (0,0,3) |
| 72.39 | 1.3055 | 11.1 | (3,2,0) |
| 72.39 | 1.3055 | 1.8 | (0,3,2) |
| 80.01 | 1.1992 | 2.1 | (4,2,2) |
| 80.01 | 1.1992 | 1.4 | (2,4,2) |
| 84.49 | 1.1467 | 1.2 | (2,1,-2) |
| 84.49 | 1.1467 | 5.9 | (4,2,1) |
| 84.49 | 1.1467 | 5.9 | (4,3,2) |
Energy Properties
Formation Energy/atom
0.00693
eV/atom
Energy/atom
-6.01133
eV/atom
Energy above Hull
0.0069
eV/atom
Uncorrected Energy
-6.0113
eV/atom
Volume/atom
78.05
ų
c/a Ratio
1.0000
Electronic Properties
Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV
Magnetic Properties
Magnetic
Yes
Total Mag. Moment
0.0000
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų
Elastic Properties
KVRH
3.578
GPa
GVRH
1.235
GPa
Young's Modulus E
3.323
GPa
Poisson Ratio ν
0.345
Pugh Ratio K/G
2.897
Vickers Hardness Est.
0.000
GPa
Ductility
Brittle
Anisotropy
6.255
Lame λ
2.755
GPa
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
K · 1.000
Element Family
N/A
Solute Fraction
0.000
Interstitial Fraction
0.000
Traditional Material Features
ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.568
Family
Pure Metal
Matrix Element
K · 1.000
Elasticity Features
Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
6.2550
Homogeneous Poisson ν
0.3450
Homogeneity
0.3450
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-10157
Reference Citation
The crystal structure and related material properties of K were obtained from the Materials Project database (MP-ID: mp-10157, 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_K
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 4.79683247
_cell_length_b 4.79683215
_cell_length_c 4.79683285
_cell_angle_alpha 60.00000261
_cell_angle_beta 60.00000486
_cell_angle_gamma 59.99999674
_symmetry_Int_Tables_number 1
_chemical_formula_structural K
_chemical_formula_sum K1
_cell_volume 78.04564503
_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
K K0 1 -0.00000000 0.00000000 0.00000000 1.0
