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HgI2

Elasticity Data ELA

MP-ID: mp-23192 · Space group: P4_2/nmc (#137)

Basic Information

Formula
HgI2
MP-ID
mp-23192
Elements
2
Sites
6
Density
5.8948
g/cm³
Volume
256.00
ų
Cell a
4.4604
Å
Cell b
4.4604
Å
Cell c
12.8677
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4_2/nmc
Point Group
4/mmm
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
13.76 6.4338 37.0 (0,0,2)
21.08 4.2144 87.9 (1,0,1)
24.28 3.6656 100.0 (1,0,2)
28.30 3.1540 1.5 (1,1,0)
28.88 3.0917 41.3 (1,0,3)
31.59 2.8320 46.3 (1,1,2)
34.37 2.6091 3.5 (1,0,4)
40.04 2.2521 83.7 (1,1,4)
40.45 2.2302 42.7 (2,0,0)
40.47 2.2291 17.1 (1,0,5)
42.14 2.1446 8.9 (0,0,6)
42.92 2.1072 9.7 (2,0,2)
46.04 1.9712 23.7 (2,1,1)
47.01 1.9328 13.7 (1,0,6)
47.74 1.9053 31.5 (2,1,2)
50.46 1.8087 18.2 (2,1,3)
51.53 1.7735 1.9 (1,1,6)
53.95 1.6996 7.5 (1,0,7)
54.10 1.6953 1.9 (2,1,4)
57.28 1.6085 6.3 (0,0,8)
58.53 1.5770 14.4 (2,2,0)
58.55 1.5766 11.7 (2,1,5)
59.83 1.5458 12.7 (2,0,6)
60.44 1.5317 3.6 (2,2,2)
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Energy Properties

Formation Energy/atom
-0.56462
eV/atom
Energy/atom
-1.68385
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-33.1787
eV/atom
Volume/atom
42.67
ų
c/a Ratio
2.8849

Electronic Properties

Metallic
Non-metal
Band Gap
1.332
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
3.392
GPa
GVRH
2.493
GPa
Young's Modulus E
6.007
GPa
Poisson Ratio ν
0.205
Pugh Ratio K/G
1.361
Vickers Hardness Est.
0.000
GPa
Ductility
Ductile
Anisotropy
9.524
Lame λ
1.730
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
I · 0.667
Element Family
Metalloid-Nonmetal
Solute Fraction
0.333
Interstitial Fraction
0.000

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
9.5240
Homogeneous Poisson ν
0.2050
Debye Temperature
80.4
K
Sound Velocity
718.3
m/s
Homogeneity
0.2050

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-23192
Reference Citation

The crystal structure and related material properties of HgI2 were obtained from the Materials Project database (MP-ID: mp-23192, database version v2026.09.28).

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_HgI2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.46038977
_cell_length_b   4.46038977
_cell_length_c   12.86764923
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgI2
_chemical_formula_sum   'Hg2 I4'
_cell_volume   256.00287096
_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
  Hg  Hg0  1  0.75000000  0.25000000  0.75000000  1.0
  Hg  Hg1  1  0.25000000  0.75000000  0.25000000  1.0
  I  I2  1  0.25000000  0.25000000  0.38679759  1.0
  I  I3  1  0.25000000  0.25000000  0.88679759  1.0
  I  I4  1  0.75000000  0.75000000  0.61320241  1.0
  I  I5  1  0.75000000  0.75000000  0.11320241  1.0
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