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Na2CrNiAs2

High-Entropy Materials HEA

MP-ID: mp-3327165 · Space group: P-4m2 (#115)

Basic Information

Formula
Na2CrNiAs2
MP-ID
mp-3327165
Elements
4
Sites
6
Density
4.5874
g/cm³
Volume
110.95
ų
Cell a
3.9807
Å
Cell b
3.9807
Å
Cell c
7.0018
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P-4m2
Point Group
-42m
Crystal System
Tetragonal
Bravais Lattice
Tetragonal P
Stability
Yes
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
12.64 7.0018 100.0 (0,0,1)
25.74 3.4605 49.2 (1,0,1)
31.79 2.8148 8.5 (1,1,0)
34.11 2.6289 33.6 (1,0,2)
34.34 2.6116 21.3 (1,1,1)
41.15 2.1937 80.8 (1,1,2)
45.03 2.0134 12.4 (1,0,3)
45.58 1.9904 44.3 (2,0,0)
47.49 1.9145 13.3 (2,0,1)
50.82 1.7967 21.8 (1,1,3)
52.26 1.7505 2.9 (0,0,4)
53.08 1.7253 13.5 (2,1,1)
57.52 1.6024 12.1 (1,0,4)
58.13 1.5868 13.6 (2,1,2)
62.48 1.4865 2.4 (1,1,4)
66.00 1.4155 7.6 (2,1,3)
66.43 1.4074 13.4 (2,2,0)
66.80 1.4004 4.8 (0,0,5)
67.94 1.3798 4.2 (2,2,1)
71.41 1.3210 1.0 (1,0,5)
71.82 1.3144 4.3 (2,0,4)
72.50 1.3037 2.8 (3,0,1)
75.53 1.2588 1.5 (3,1,0)
76.29 1.2482 10.2 (2,1,4)
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Energy Properties

Formation Energy/atom
-0.48321
eV/atom
Energy/atom
-11.08296
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-11.0830
eV/atom
Volume/atom
18.49
ų
c/a Ratio
1.7589

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
2.0001
μB
Mag. Ordering
FiM
Mag. Sites
2
Magnetization/Volume
0.018030
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Na · 0.333
Element Family
Alkali-AlkEarth
Solute Fraction
0.667
Interstitial Fraction
0.000

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
4.0090
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
21.937%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.5267
smaller = more stable mixing
VEC
4.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-3.139
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9591
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3327165
Reference Citation

The crystal structure and related material properties of Na2CrNiAs2 were obtained from the Materials Project database (MP-ID: mp-3327165, 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_Na2CrNiAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.98069461
_cell_length_b   3.98069461
_cell_length_c   7.00181588
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CrNiAs2
_chemical_formula_sum   'Na2 Cr1 Ni1 As2'
_cell_volume   110.95028141
_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
  Na  Na0  1  0.00000000  0.50000000  0.35014144  1.0
  Na  Na1  1  0.50000000  0.00000000  0.64985856  1.0
  Cr  Cr2  1  0.50000000  0.50000000  0.00000000  1.0
  Ni  Ni3  1  0.00000000  0.00000000  0.00000000  1.0
  As  As4  1  0.50000000  0.00000000  0.20473715  1.0
  As  As5  1  0.00000000  0.50000000  0.79526285  1.0
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