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Mg2Si2IrPd

High-Entropy Materials HEA

MP-ID: mp-3291444 · Space group: Pmc2_1 (#26)

Basic Information

Formula
Mg2Si2IrPd
MP-ID
mp-3291444
Elements
4
Sites
12
Density
7.0973
g/cm³
Volume
188.77
ų
Cell a
6.5507
Å
Cell b
4.0652
Å
Cell c
7.0887
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pmc2_1
Point Group
mm2
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic P
Stability
Yes
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
12.49 7.0887 3.2 (0,0,1)
18.44 4.8110 90.1 (1,0,1)
21.86 4.0652 7.6 (0,1,0)
25.13 3.5444 35.8 (0,0,2)
25.25 3.5265 15.3 (0,1,1)
27.23 3.2754 14.0 (2,0,0)
28.64 3.1173 14.1 (1,0,2)
28.75 3.1051 100.0 (1,1,1)
30.05 2.9733 4.6 (2,0,1)
33.54 2.6715 3.0 (0,1,2)
35.19 2.5505 46.9 (2,1,0)
36.32 2.4737 36.5 (1,1,2)
37.38 2.4055 11.9 (2,0,2)
37.47 2.3999 17.9 (2,1,1)
40.59 2.2227 9.4 (1,0,3)
43.36 2.0868 44.7 (3,0,1)
43.73 2.0702 37.0 (2,1,2)
44.34 2.0429 34.7 (0,1,3)
44.58 2.0326 31.6 (0,2,0)
46.57 1.9503 21.1 (1,1,3)
47.44 1.9163 14.7 (2,0,3)
48.63 1.8724 14.8 (1,2,1)
49.00 1.8591 2.5 (3,0,2)
49.07 1.8565 6.6 (3,1,1)
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Energy Properties

Formation Energy/atom
-0.67649
eV/atom
Energy/atom
-17.54415
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-17.5442
eV/atom
Volume/atom
15.73
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0017
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000010
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Mg · 0.333
Element Family
Alkali-AlkEarth
Solute Fraction
0.667
Interstitial Fraction
0.333

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3297
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.0548
J/mol·K
Ω Parameter
0.4297
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
12.756%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3697
smaller = more stable mixing
VEC
5.167
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-41.967
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9591
SS Former
0
Phase Tendency
AM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291444
Reference Citation

The crystal structure and related material properties of Mg2Si2IrPd were obtained from the Materials Project database (MP-ID: mp-3291444, 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_Mg2Si2IrPd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.55074315
_cell_length_b   4.06520626
_cell_length_c   7.08872816
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2Si2IrPd
_chemical_formula_sum   'Mg4 Si4 Ir2 Pd2'
_cell_volume   188.77369634
_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
  Mg  Mg0  1  0.50483676  0.24999900  0.17993635  1.0
  Mg  Mg1  1  0.00483576  0.24999900  0.32006465  1.0
  Mg  Mg2  1  0.98738440  0.75000000  0.67269229  1.0
  Mg  Mg3  1  0.48738440  0.75000000  0.82730871  1.0
  Si  Si4  1  0.20446359  0.75000000  0.13779573  1.0
  Si  Si5  1  0.70446359  0.75000000  0.36220427  1.0
  Si  Si6  1  0.29134128  0.24999900  0.61558715  1.0
  Si  Si7  1  0.79134028  0.24999900  0.88441285  1.0
  Ir  Ir8  1  0.84843176  0.75000000  0.05248499  1.0
  Ir  Ir9  1  0.34843176  0.75000000  0.44751501  1.0
  Pd  Pd10  1  0.66354321  0.24999900  0.55462573  1.0
  Pd  Pd11  1  0.16354221  0.24999900  0.94537427  1.0
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