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HEAS Data Platform · Materials Science Database

MP-ID: mp-1018122 · Space group: R-3m (#166)

Basic Information

Formula
Tm
MP-ID
mp-1018122
Elements
1
Sites
3
Density
9.1484
g/cm³
Volume
91.99
ų
Cell a
3.5258
Å
Cell b
3.5258
Å
Cell c
8.7838
Å
α Angle
78.42
°
β Angle
78.42
°
γ Angle
60.00
°
Space Group
R-3m
Point Group
-3m
Crystal System
Trigonal
Bravais Lattice
hR
Stability
No
Packing Fraction
-

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
29.46 3.0320 20.7 (1,0,0)
29.46 3.0320 20.7 (1,1,1)
29.46 3.0320 20.7 (0,1,0)
30.09 2.9703 8.2 (1,0,1)
30.09 2.9703 8.2 (1,1,0)
30.09 2.9703 8.2 (0,1,1)
31.41 2.8482 86.3 (0,0,3)
32.48 2.7565 55.6 (1,0,-1)
32.48 2.7565 55.6 (1,1,2)
32.48 2.7565 55.6 (0,1,-1)
34.18 2.6234 50.0 (1,0,2)
34.18 2.6234 100.0 (1,1,-1)
38.38 2.3452 4.5 (1,0,-2)
38.38 2.3452 4.5 (1,1,3)
38.38 2.3452 4.5 (0,1,-2)
40.82 2.2105 7.9 (1,0,3)
40.82 2.2105 15.9 (1,1,-2)
46.24 1.9633 6.6 (1,0,-3)
46.24 1.9633 6.6 (1,1,4)
46.24 1.9633 6.6 (0,1,-3)
49.18 1.8525 6.1 (1,0,4)
51.86 1.7629 21.4 (2,1,1)
51.86 1.7629 21.4 (1,-1,0)
51.86 1.7629 21.4 (1,2,1)
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Energy Properties

Formation Energy/atom
0.00667
eV/atom
Energy/atom
-35.11438
eV/atom
Energy above Hull
0.0067
eV/atom
Uncorrected Energy
-35.1144
eV/atom
Volume/atom
30.66
ų
c/a Ratio
2.4913

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
1.6202
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.017610
μB/ų

Elastic Properties

KVRH
43.971
GPa
GVRH
28.525
GPa
Young's Modulus E
70.360
GPa
Poisson Ratio ν
0.233
Pugh Ratio K/G
1.541
Vickers Hardness Est.
-
GPa
Ductility
Ductile
Anisotropy
0.133
Lame λ
24.954
GPa

Feature Analysis

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Tm · 1.000
Element Family
N/A
Solute Fraction
0.000
Interstitial Fraction
0.000
ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.568
Family
Pure Metal
Matrix Element
Tm · 1.000

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1018122
Reference Citation

The crystal structure and related material properties of Tm were obtained from the Materials Project database (MP-ID: mp-1018122, 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

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_Tm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.52580613
_cell_length_b   3.52580377
_cell_length_c   8.78379385
_cell_angle_alpha   78.42213356
_cell_angle_beta   78.42214394
_cell_angle_gamma   60.00000225
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tm
_chemical_formula_sum   Tm3
_cell_volume   91.99032560
_cell_formula_units_Z   3
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
  Tm  Tm0  1  -0.00000000  -0.00000000  0.00000000  1.0
  Tm  Tm1  1  0.77829450  0.77829450  0.66511650  1.0
  Tm  Tm2  1  0.22170550  0.22170550  0.33488350  1.0
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