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C

Elasticity Data ELA

MP-ID: mp-169 · Space group: R-3m (#166)

Basic Information

Formula
C
MP-ID
mp-169
Elements
1
Sites
2
Density
2.1791
g/cm³
Volume
18.31
ų
Cell a
2.4565
Å
Cell b
2.4565
Å
Cell c
3.7645
Å
α Angle
71.50
°
β Angle
71.50
°
γ Angle
60.00
°
Space Group
R-3m
Point Group
-3m
Crystal System
Trigonal
Bravais Lattice
Trigonal R
Stability
No
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 15)
2θd (Å)Ihkl
25.43 3.5028 100.0 (0,0,1)
43.35 2.0874 7.5 (1,0,0)
43.50 2.0804 3.7 (1,1,1)
45.84 1.9794 3.0 (1,1,0)
46.12 1.9681 5.9 (1,0,1)
52.23 1.7514 7.1 (0,0,2)
55.42 1.6578 2.8 (1,0,-1)
55.92 1.6442 1.4 (1,1,2)
62.27 1.4910 1.8 (1,0,2)
77.75 1.2283 1.7 (1,-1,0)
77.76 1.2282 3.3 (2,1,1)
82.64 1.1676 1.4 (0,0,3)
83.08 1.1625 2.8 (2,1,0)
83.38 1.1591 2.8 (1,-1,1)
83.70 1.1555 2.8 (2,1,2)
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Energy Properties

Formation Energy/atom
0.00079
eV/atom
Energy/atom
-9.94644
eV/atom
Energy above Hull
0.0008
eV/atom
Uncorrected Energy
-9.9464
eV/atom
Volume/atom
9.15
ų
c/a Ratio
1.5325

Electronic Properties

Metallic
Non-metal
Band Gap
0.198
eV
Direct Gap
Yes
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
115.697
GPa
GVRH
80.084
GPa
Young's Modulus E
195.211
GPa
Poisson Ratio ν
0.219
Pugh Ratio K/G
1.445
Vickers Hardness Est.
13.891
GPa
Ductility
Ductile
Anisotropy
692.365
Lame λ
62.308
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
C · 1.000
Element Family
Metalloid-Nonmetal
Solute Fraction
0.000
Interstitial Fraction
1.000

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
692.3650
Homogeneous Poisson ν
0.2190
Debye Temperature
954.3
K
Sound Velocity
6,706.4
m/s
Homogeneity
0.2190

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-169
Reference Citation

The crystal structure and related material properties of C were obtained from the Materials Project database (MP-ID: mp-169, 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_C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.45645465
_cell_length_b   2.45645465
_cell_length_c   3.76452542
_cell_angle_alpha   71.50336991
_cell_angle_beta   71.50336991
_cell_angle_gamma   60.00296887
_symmetry_Int_Tables_number   1
_chemical_formula_structural   C
_chemical_formula_sum   C2
_cell_volume   18.30544095
_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
  C  C0  1  0.83335553  0.83335553  -0.00009304  1.0
  C  C1  1  0.16664447  0.16664447  0.00009304  1.0
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