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CsI

Elasticity Data ELA

MP-ID: mp-1056920 · Space group: Pm-3m (#221)

Basic Information

Formula
CsI
MP-ID
mp-1056920
Elements
2
Sites
2
Density
4.2490
g/cm³
Volume
101.53
ų
Cell a
4.6652
Å
Cell b
4.6652
Å
Cell c
4.6652
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pm-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
Cubic P
Stability
No
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 9)
2θd (Å)Ihkl
27.03 3.2988 100.0 (1,1,0)
38.60 2.3326 19.1 (2,0,0)
47.75 1.9046 41.1 (2,1,1)
55.73 1.6494 13.0 (2,2,0)
63.01 1.4753 17.9 (3,1,0)
69.84 1.3467 4.4 (2,2,2)
76.38 1.2468 20.7 (3,2,1)
82.75 1.1663 2.1 (4,0,0)
89.03 1.0996 10.9 (3,3,0)
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Energy Properties

Formation Energy/atom
-1.69669
eV/atom
Energy/atom
-2.91269
eV/atom
Energy above Hull
0.0325
eV/atom
Uncorrected Energy
-2.7232
eV/atom
Volume/atom
50.77
ų
c/a Ratio
-

Electronic Properties

Metallic
Non-metal
Band Gap
3.677
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0000
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

KVRH
9.862
GPa
GVRH
5.449
GPa
Young's Modulus E
13.805
GPa
Poisson Ratio ν
0.267
Pugh Ratio K/G
1.810
Vickers Hardness Est.
0.000
GPa
Ductility
Brittle
Anisotropy
0.681
Lame λ
6.229
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Cs · 0.500
Element Family
Alkali-AlkEarth
Solute Fraction
0.500
Interstitial Fraction
0.000

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.6810
Homogeneous Poisson ν
0.2670
Homogeneity
0.2670

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1056920
Reference Citation

The crystal structure and related material properties of CsI were obtained from the Materials Project database (MP-ID: mp-1056920, 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_CsI
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.66521200
_cell_length_b   4.66521200
_cell_length_c   4.66521200
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CsI
_chemical_formula_sum   'Cs1 I1'
_cell_volume   101.53462103
_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
  Cs  Cs0  1  0.00000000  0.00000000  0.00000000  1.0
  I  I1  1  0.50000000  0.50000000  0.50000000  1.0
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