Basic Information
Formula
Ge
MP-ID
mp-998883
Elements
1
Sites
1
Density
6.6314
g/cm³
Volume
18.19
ų
Cell a
2.8696
Å
Cell b
2.8696
Å
Cell c
2.8696
Å
α Angle
109.47
°
β Angle
109.47
°
γ Angle
109.47
°
Space Group
Im-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
cI
Stability
No
Packing Fraction
0.6802
X-ray Diffraction
Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 4)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 38.42 | 2.3430 | 100.0 | (1,0,0) |
| 55.46 | 1.6567 | 16.8 | (1,1,-1) |
| 69.49 | 1.3527 | 33.7 | (1,1,0) |
| 82.31 | 1.1715 | 10.6 | (2,0,0) |
Energy Properties
Formation Energy/atom
0.33949
eV/atom
Energy/atom
-13.53249
eV/atom
Energy above Hull
0.3395
eV/atom
Uncorrected Energy
-4.2835
eV/atom
Volume/atom
18.19
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
61.324
GPa
GVRH
19.966
GPa
Young's Modulus E
54.034
GPa
Poisson Ratio ν
0.353
Pugh Ratio K/G
3.071
Vickers Hardness Est.
-
GPa
Ductility
Brittle
Anisotropy
0.918
Lame λ
48.013
GPa
Feature Analysis
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ge · 1.000
Element Family
N/A
Solute Fraction
0.000
Interstitial Fraction
0.000
ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.373
Family
Pure Metal
Matrix Element
Ge · 1.000
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-998883
Reference Citation
The crystal structure and related material properties of Ge were obtained from the Materials Project database (MP-ID: mp-998883, 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_Ge
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 2.86955252
_cell_length_b 2.86955252
_cell_length_c 2.86955252
_cell_angle_alpha 109.47122063
_cell_angle_beta 109.47122063
_cell_angle_gamma 109.47122063
_symmetry_Int_Tables_number 1
_chemical_formula_structural Ge
_chemical_formula_sum Ge1
_cell_volume 18.18949504
_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
Ge Ge0 1 0.00000000 -0.00000000 0.00000000 1.0
