Basic Information
Formula
Ge
MP-ID
mp-1007760
Elements
1
Sites
4
Density
5.2827
g/cm³
Volume
91.33
ų
Cell a
3.9976
Å
Cell b
3.9976
Å
Cell c
6.5994
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 24)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 25.73 | 3.4620 | 57.2 | (1,0,-1,0) |
| 25.73 | 3.4620 | 57.2 | (0,1,-1,0) |
| 25.73 | 3.4620 | 57.2 | (1,-1,0,0) |
| 27.02 | 3.2997 | 100.0 | (0,0,0,2) |
| 29.13 | 3.0658 | 37.0 | (1,0,-1,1) |
| 29.13 | 3.0658 | 74.1 | (1,-1,0,1) |
| 37.66 | 2.3886 | 20.6 | (1,0,-1,2) |
| 37.66 | 2.3886 | 41.3 | (1,-1,0,2) |
| 45.37 | 1.9988 | 97.6 | (2,-1,-1,0) |
| 45.37 | 1.9988 | 48.8 | (1,-2,1,0) |
| 49.07 | 1.8567 | 49.8 | (1,0,-1,3) |
| 49.07 | 1.8567 | 99.5 | (1,-1,0,3) |
| 52.89 | 1.7310 | 7.7 | (2,0,-2,0) |
| 52.89 | 1.7310 | 15.4 | (2,-2,0,0) |
| 53.61 | 1.7096 | 29.2 | (1,1,-2,2) |
| 53.61 | 1.7096 | 29.2 | (2,-1,-1,2) |
| 53.61 | 1.7096 | 29.2 | (1,-2,1,2) |
| 54.83 | 1.6744 | 6.1 | (2,0,-2,1) |
| 54.83 | 1.6744 | 6.1 | (0,2,-2,1) |
| 54.83 | 1.6744 | 6.1 | (2,-2,0,1) |
| 60.39 | 1.5329 | 5.1 | (2,0,-2,2) |
| 60.39 | 1.5329 | 5.1 | (0,2,-2,2) |
| 60.39 | 1.5329 | 5.1 | (2,-2,0,2) |
| 69.04 | 1.3603 | 17.5 | (2,0,-2,3) |
Energy Properties
Formation Energy/atom
0.01668
eV/atom
Energy/atom
-13.85530
eV/atom
Energy above Hull
0.0167
eV/atom
Uncorrected Energy
-13.8553
eV/atom
Volume/atom
22.83
ų
c/a Ratio
1.6508
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
59.529
GPa
GVRH
45.231
GPa
Young's Modulus E
108.271
GPa
Poisson Ratio ν
0.197
Pugh Ratio K/G
1.316
Vickers Hardness Est.
-
GPa
Ductility
Ductile
Anisotropy
0.171
Lame λ
29.375
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
0.562
Family
Pure Metal
Matrix Element
Ge · 1.000
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-1007760
Reference Citation
The crystal structure and related material properties of Ge were obtained from the Materials Project database (MP-ID: mp-1007760, 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 3.99759578
_cell_length_b 3.99757591
_cell_length_c 6.59937795
_cell_angle_alpha 90.00000000
_cell_angle_beta 90.00000000
_cell_angle_gamma 119.99982882
_symmetry_Int_Tables_number 1
_chemical_formula_structural Ge
_chemical_formula_sum Ge4
_cell_volume 91.33347444
_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
Ge Ge0 1 0.66666688 0.33333470 0.50040125 1.0
Ge Ge1 1 0.33333312 0.66666430 0.00040125 1.0
Ge Ge2 1 0.66666688 0.33333470 0.87459875 1.0
Ge Ge3 1 0.33333312 0.66666430 0.37459875 1.0
