Ho
Traditional Materials TRA Elasticity Data ELAMP-ID: mp-973986 · Space group: P6_3/mmc (#194)
Basic Information
Formula
Ho
MP-ID
mp-973986
Elements
1
Sites
4
Density
8.8210
g/cm³
Volume
124.19
ų
Cell a
3.5525
Å
Cell b
3.5525
Å
Cell c
11.3633
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 |
|---|---|---|---|
| 29.02 | 3.0765 | 7.8 | (1,0,-1,0) |
| 29.02 | 3.0765 | 3.9 | (0,1,-1,0) |
| 30.09 | 2.9696 | 42.8 | (1,0,-1,1) |
| 30.09 | 2.9696 | 21.4 | (0,1,-1,1) |
| 31.49 | 2.8408 | 50.7 | (0,0,0,4) |
| 33.11 | 2.7054 | 100.0 | (1,0,-1,2) |
| 33.11 | 2.7054 | 50.0 | (0,1,-1,2) |
| 37.67 | 2.3881 | 23.6 | (1,0,-1,3) |
| 37.67 | 2.3881 | 11.8 | (0,1,-1,3) |
| 43.35 | 2.0871 | 2.7 | (1,-1,0,4) |
| 43.35 | 2.0871 | 5.3 | (1,0,-1,4) |
| 49.89 | 1.8280 | 5.3 | (1,-1,0,5) |
| 49.89 | 1.8280 | 10.6 | (1,0,-1,5) |
| 51.45 | 1.7762 | 12.9 | (2,-1,-1,0) |
| 51.45 | 1.7762 | 12.9 | (1,-2,1,0) |
| 51.45 | 1.7762 | 12.9 | (1,1,-2,0) |
| 57.11 | 1.6128 | 21.3 | (1,0,-1,6) |
| 57.11 | 1.6128 | 10.6 | (0,1,-1,6) |
| 60.76 | 1.5244 | 2.9 | (2,-2,0,1) |
| 60.76 | 1.5244 | 2.9 | (2,0,-2,1) |
| 60.76 | 1.5244 | 2.9 | (0,2,-2,1) |
| 61.58 | 1.5061 | 15.1 | (2,-1,-1,4) |
| 61.58 | 1.5061 | 30.1 | (1,1,-2,4) |
| 62.56 | 1.4848 | 8.1 | (2,-2,0,2) |
Energy Properties
Formation Energy/atom
0.02443
eV/atom
Energy/atom
-32.85691
eV/atom
Energy above Hull
0.0244
eV/atom
Uncorrected Energy
-32.8569
eV/atom
Volume/atom
31.05
ų
c/a Ratio
3.1987
Electronic Properties
Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV
Magnetic Properties
Magnetic
Yes
Total Mag. Moment
0.0007
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.000010
μB/ų
Elastic Properties
KVRH
42.273
GPa
GVRH
28.439
GPa
Young's Modulus E
69.689
GPa
Poisson Ratio ν
0.225
Pugh Ratio K/G
1.486
Vickers Hardness Est.
5.916
GPa
Ductility
Ductile
Anisotropy
0.072
Lame λ
23.314
GPa
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ho · 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
0.557
Family
Pure Metal
Matrix Element
Ho · 1.000
Elasticity Features
Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.0720
Homogeneous Poisson ν
0.2250
Homogeneity
0.2250
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-973986
Reference Citation
The crystal structure and related material properties of Ho were obtained from the Materials Project database (MP-ID: mp-973986, 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_Ho
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 3.55246869
_cell_length_b 3.55246822
_cell_length_c 11.36326606
_cell_angle_alpha 90.00000000
_cell_angle_beta 90.00000000
_cell_angle_gamma 120.00001428
_symmetry_Int_Tables_number 1
_chemical_formula_structural Ho
_chemical_formula_sum Ho4
_cell_volume 124.19216710
_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
Ho Ho0 1 -0.00000000 0.00000000 0.00000000 1.0
Ho Ho1 1 0.33333300 0.66666500 0.25000000 1.0
Ho Ho2 1 -0.00000000 0.00000000 0.50000000 1.0
Ho Ho3 1 0.66666800 0.33333400 0.75000000 1.0
