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Sm2CoGe2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1079047 · Space group: C2/m (#12)

Basic Information

Formula
Sm2CoGe2
MP-ID
mp-1079047
Elements
3
Sites
10
Density
7.9477
g/cm³
Volume
210.99
ų
Cell a
5.7903
Å
Cell b
5.7903
Å
Cell c
10.4229
Å
α Angle
63.61
°
β Angle
63.61
°
γ Angle
43.44
°
Space Group
C2/m
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic C
Stability
No
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
9.66 9.1530 2.6 (0,0,1)
16.49 5.3743 1.2 (1,1,1)
18.79 4.7238 1.7 (1,1,0)
22.79 3.9027 15.2 (1,0,0)
22.94 3.8770 3.1 (1,0,1)
25.01 3.5606 8.6 (1,1,-1)
26.11 3.4128 16.5 (1,1,3)
26.54 3.3585 21.8 (1,0,-1)
26.94 3.3100 5.4 (1,0,2)
29.27 3.0510 1.7 (0,0,3)
32.79 2.7315 79.8 (2,1,1)
32.98 2.7163 57.4 (1,0,-2)
33.11 2.7052 30.9 (2,1,2)
33.14 2.7035 24.2 (1,1,-2)
33.34 2.6871 43.0 (2,2,2)
33.52 2.6736 100.0 (1,0,3)
34.38 2.6088 4.2 (2,2,1)
34.42 2.6057 7.7 (1,1,4)
35.37 2.5377 1.2 (2,1,0)
36.28 2.4758 55.4 (2,1,3)
38.10 2.3619 15.8 (2,2,0)
39.38 2.2882 37.3 (0,0,4)
39.62 2.2750 23.9 (2,2,4)
40.38 2.2338 68.1 (2,1,-1)
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Energy Properties

Formation Energy/atom
-0.69239
eV/atom
Energy/atom
-5.85572
eV/atom
Energy above Hull
0.0091
eV/atom
Uncorrected Energy
-5.8557
eV/atom
Volume/atom
21.10
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
1.1385
μB
Mag. Ordering
FiM
Mag. Sites
4
Magnetization/Volume
0.005400
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Sm · 0.400
Element Family
Lanthanide
Solute Fraction
0.600
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0549
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.7706
J/mol·K
Ω Parameter
10.9103
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
19.727%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3932
smaller = more stable mixing
VEC
5.800
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
1.106
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9602
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.462
Family
Sm-rich Multi-Component
Matrix Element
Sm · 0.400

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1079047
Reference Citation

The crystal structure and related material properties of Sm2CoGe2 were obtained from the Materials Project database (MP-ID: mp-1079047, 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

BibTeX
@article{Horton2025,
  author  = {Horton, Matthew K. and Huck, Patrick and Yang, Ruo Xi and Munro, Jason M. and Dwaraknath, Shyam and Ganose, Alex M. and Kingsbury, Ryan S. and Wen, Mingjian and Shen, Jimmy X. and Mathis, Tyler S. and Kaplan, Aaron D. and Berket, Karlo and Riebesell, Janosh and George, Janine and Rosen, Andrew S. and Spotte-Smith, Evan W. C. and McDermott, Matthew J. and Cohen, Orion A. and Dunn, Alex and Kuner, Matthew C. and Rignanese, Gian-Marco and Petretto, Guido and Waroquiers, David and Griffin, Sinead M. and Neaton, Jeffrey B. and Chrzan, Daryl C. and Asta, Mark and Hautier, Geoffroy and Cholia, Shreyas and Ceder, Gerbrand and Ong, Shyue Ping and Jain, Anubhav and Persson, Kristin A.},
  title   = {Accelerated data-driven materials science with the Materials Project},
  journal = {Nature Materials},
  year    = {2025},
  volume  = {24},
  number  = {10},
  pages   = {1522--1532},
  month   = {oct},
  doi     = {10.1038/s41563-025-02272-0},
  issn    = {1476-4660},
  url     = {https://doi.org/10.1038/s41563-025-02272-0},
  abstract = {The Materials Project was launched formally in 2011 to drive materials discovery forwards through high-throughput computation and open data. More than a decade later, the Materials Project has become an indispensable tool used by more than 600,000 materials researchers around the world. This Perspective describes how the Materials Project, as a data platform and a software ecosystem, has helped to shape research in data-driven materials science. We cover how sustainable software and computational methods have accelerated materials design while becoming more open source and collaborative in nature. Next, we present cases where the Materials Project was used to understand and discover functional materials. We then describe our efforts to meet the needs of an expanding user base, through technical infrastructure updates ranging from data architecture and cloud resources to interactive web applications. Finally, we discuss opportunities to better aid the research community, with the vision that more accessible and easy-to-understand materials data will result in democratized materials knowledge and an increasingly collaborative community.}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_Sm2CoGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.79027080
_cell_length_b   5.79027080
_cell_length_c   10.42290063
_cell_angle_alpha   63.61423549
_cell_angle_beta   63.61423549
_cell_angle_gamma   43.43730158
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm2CoGe2
_chemical_formula_sum   'Sm4 Co2 Ge4'
_cell_volume   210.99382129
_cell_formula_units_Z   2
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
  Sm  Sm0  1  0.18798700  0.18798700  0.88922400  1.0
  Sm  Sm1  1  0.81201300  0.81201300  0.11077600  1.0
  Sm  Sm2  1  0.00552800  0.00552800  0.66765100  1.0
  Sm  Sm3  1  0.99447200  0.99447200  0.33234900  1.0
  Co  Co4  1  0.27482600  0.27482600  0.36403200  1.0
  Co  Co5  1  0.72517400  0.72517400  0.63596800  1.0
  Ge  Ge6  1  0.49133800  0.49133800  0.87493400  1.0
  Ge  Ge7  1  0.50866200  0.50866200  0.12506600  1.0
  Ge  Ge8  1  0.34422500  0.34422500  0.56634800  1.0
  Ge  Ge9  1  0.65577500  0.65577500  0.43365200  1.0
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