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SrAcZn2

High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELA

MP-ID: mp-978929 · Space group: Fm-3m (#225)

Basic Information

Formula
SrAcZn2
MP-ID
mp-978929
Elements
3
Sites
4
Density
6.2770
g/cm³
Volume
117.84
ų
Cell a
5.5030
Å
Cell b
5.5030
Å
Cell c
5.5030
Å
α Angle
60.00
°
β Angle
60.00
°
γ Angle
60.00
°
Space Group
Fm-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
Cubic F
Stability
Yes
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 17)
2θd (Å)Ihkl
19.76 4.4932 18.6 (1,0,0)
22.85 3.8912 15.8 (1,1,0)
32.54 2.7515 100.0 (2,1,1)
38.36 2.3465 11.0 (2,2,1)
40.14 2.2466 5.1 (2,0,0)
46.69 1.9456 18.3 (2,2,0)
51.16 1.7854 5.1 (3,2,2)
52.59 1.7402 7.3 (3,2,1)
58.06 1.5886 38.0 (3,3,2)
61.96 1.4977 3.9 (3,3,1)
68.16 1.3758 11.7 (4,2,2)
71.75 1.3155 3.8 (4,3,2)
72.93 1.2971 3.8 (4,3,3)
77.59 1.2305 16.2 (4,3,1)
81.02 1.1868 1.4 (4,4,3)
82.16 1.1732 2.3 (4,4,2)
86.68 1.1233 4.1 (4,0,0)
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Energy Properties

Formation Energy/atom
-0.21478
eV/atom
Energy/atom
-25.61586
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-25.6159
eV/atom
Volume/atom
29.46
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
0.0000
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

KVRH
34.157
GPa
GVRH
22.956
GPa
Young's Modulus E
56.264
GPa
Poisson Ratio ν
0.225
Pugh Ratio K/G
1.488
Vickers Hardness Est.
4.857
GPa
Ductility
Ductile
Anisotropy
0.094
Lame λ
18.853
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Zn · 0.500
Element Family
3d-TM
Solute Fraction
0.500
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0397
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.6442
J/mol·K
Ω Parameter
0.0000
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
19.185%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3170
smaller = more stable mixing
VEC
7.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.000
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9464
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.594
Family
Zn-based Alloy
Matrix Element
Zn · 0.500

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.0940
Homogeneous Poisson ν
0.2250
Debye Temperature
307.0
K
Sound Velocity
2,117.1
m/s
Homogeneity
0.2250

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-978929
Reference Citation

The crystal structure and related material properties of SrAcZn2 were obtained from the Materials Project database (MP-ID: mp-978929, 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_SrAcZn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.50300487
_cell_length_b   5.50300487
_cell_length_c   5.50300487
_cell_angle_alpha   60.00000000
_cell_angle_beta   60.00000000
_cell_angle_gamma   60.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrAcZn2
_chemical_formula_sum   'Sr1 Ac1 Zn2'
_cell_volume   117.83781837
_cell_formula_units_Z   1
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
  Sr  Sr0  1  0.75000000  0.75000000  0.75000000  1.0
  Ac  Ac1  1  0.24999900  0.24999900  0.24999900  1.0
  Zn  Zn2  1  0.00000000  0.00000000  -0.00000000  1.0
  Zn  Zn3  1  0.50000100  0.50000100  0.50000100  1.0
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