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AlN

Elasticity Data ELA

MP-ID: mp-661 · Space group: P6_3mc (#186)

Basic Information

Formula
AlN
MP-ID
mp-661
Elements
2
Sites
4
Density
3.2009
g/cm³
Volume
42.53
ų
Cell a
3.1286
Å
Cell b
3.1286
Å
Cell c
5.0170
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P6_3mc
Point Group
6mm
Crystal System
Hexagonal
Bravais Lattice
Hexagonal P
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
33.06 2.7094 35.6 (0,1,-1,0)
33.06 2.7094 71.2 (1,0,-1,0)
35.80 2.5085 66.2 (0,0,0,2)
37.73 2.3840 100.0 (1,0,-1,1)
49.52 1.8407 36.1 (1,0,-1,2)
59.05 1.5643 65.5 (2,-1,-1,0)
65.60 1.4231 19.6 (0,1,-1,3)
65.60 1.4231 39.2 (1,0,-1,3)
69.37 1.3547 9.6 (2,0,-2,0)
71.01 1.3274 30.6 (1,1,-2,2)
71.01 1.3274 15.3 (2,-1,-1,2)
72.24 1.3079 5.6 (0,2,-2,1)
72.24 1.3079 11.1 (2,0,-2,1)
75.85 1.2542 2.3 (0,0,0,4)
80.59 1.1920 2.6 (0,2,-2,2)
80.59 1.1920 5.3 (2,0,-2,2)
85.27 1.1382 2.6 (1,0,-1,4)
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Energy Properties

Formation Energy/atom
-1.67967
eV/atom
Energy/atom
-9.61010
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-9.6101
eV/atom
Volume/atom
10.63
ų
c/a Ratio
1.6036

Electronic Properties

Metallic
Non-metal
Band Gap
4.054
eV
Direct Gap
Yes
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
194.620
GPa
GVRH
122.306
GPa
Young's Modulus E
303.369
GPa
Poisson Ratio ν
0.240
Pugh Ratio K/G
1.591
Vickers Hardness Est.
16.326
GPa
Ductility
Ductile
Anisotropy
0.040
Lame λ
113.083
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Al · 0.500
Element Family
PostTransition-Noble
Solute Fraction
0.500
Interstitial Fraction
0.500

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.0400
Homogeneous Poisson ν
0.2400
Debye Temperature
927.8
K
Sound Velocity
6,854.8
m/s
Homogeneity
0.2400

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-661
Reference Citation

The crystal structure and related material properties of AlN were obtained from the Materials Project database (MP-ID: mp-661, 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_AlN
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.12858800
_cell_length_b   3.12858827
_cell_length_c   5.01695500
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999712
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlN
_chemical_formula_sum   'Al2 N2'
_cell_volume   42.52728308
_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
  Al  Al0  1  0.66666700  0.33333300  0.49928700  1.0
  Al  Al1  1  0.33333300  0.66666700  0.99928700  1.0
  N  N2  1  0.66666700  0.33333300  0.88071300  1.0
  N  N3  1  0.33333300  0.66666700  0.38071300  1.0
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