# Data for this dataset was extrated 
# from http://www.chem.helsinki.fi/~pyykko/Radii12.pdf
#
# In case the link is no longer valid, data provided in the link could be found 
# in paper "Refitted tetrahedral covalent radii for solids", 
# doi: 10.1103/PhysRevB.85.024115
---
Li:
  atomic_number: 3
  covalent_radii:
    tetrahedral: 137
Be:
  atomic_number: 4
  covalent_radii:
    tetrahedral: 106.1
B:
  atomic_number: 5
  covalent_radii:
    tetrahedral: 88.2
C:
  atomic_number: 6
  covalent_radii:
    tetrahedral: 77.3
N:
  atomic_number: 7
  covalent_radii:
    tetrahedral: 68.9
O:
  atomic_number: 8
  covalent_radii:
    tetrahedral: 67.4
F:
  atomic_number: 9
  covalent_radii:
    tetrahedral: 57.5
Mg:
  atomic_number: 12
  covalent_radii:
    tetrahedral: 141.2
Al:
  atomic_number: 13
  covalent_radii:
    tetrahedral: 128.5
Si:
  atomic_number: 14
  covalent_radii:
    tetrahedral: 117.6
P:
  atomic_number: 15
  covalent_radii:
    tetrahedral: 108.4
S:
  atomic_number: 16
  covalent_radii:
    tetrahedral: 104.2
Cl:
  atomic_number: 17
  covalent_radii:
    tetrahedral: 107.6
Sc:
  atomic_number: 21
  covalent_radii:
    tetrahedral: 138.6
Mn:
  atomic_number: 25
  covalent_radii:
    tetrahedral: 140.3
Fe:
  atomic_number: 26
  covalent_radii:
    tetrahedral: 120.9
Co:
  atomic_number: 27
  covalent_radii:
    tetrahedral: 125.6
Cu:
  atomic_number: 29
  covalent_radii:
    tetrahedral: 127.1
Zn:
  atomic_number: 30
  covalent_radii:
    tetrahedral: 130.4
Ga:
  atomic_number: 31
  covalent_radii:
    tetrahedral: 127.5
Ge:
  atomic_number: 32
  covalent_radii:
    tetrahedral: 122.5
As:
  atomic_number: 33
  covalent_radii:
    tetrahedral: 117.4
Se:
  atomic_number: 34
  covalent_radii:
    tetrahedral: 114.5
Br:
  atomic_number: 35
  covalent_radii:
    tetrahedral: 119.5
Ag:
  atomic_number: 47
  covalent_radii:
    tetrahedral: 147.3
Cd:
  atomic_number: 48
  covalent_radii:
    tetrahedral: 148.2
In:
  atomic_number: 49
  covalent_radii:
    tetrahedral: 145.5
Sn:
  atomic_number: 50
  covalent_radii:
    tetrahedral: 140.0
Sb:
  atomic_number: 51
  covalent_radii:
    tetrahedral: 136.3
Te:
  atomic_number: 52
  covalent_radii:
    tetrahedral: 133.5
I:
  atomic_number: 53
  covalent_radii:
    tetrahedral: 134.5
Hg:
  atomic_number: 80
  covalent_radii:
    tetrahedral: 147.8
Tl:
  atomic_number: 81
  covalent_radii:
    tetrahedral: 138
Pb:
  atomic_number: 82
  covalent_radii:
    tetrahedral: 144.1
Bi:
  atomic_number: 83
  covalent_radii:
    tetrahedral: 146.0
Po:
  atomic_number: 84
  covalent_radii:
    tetrahedral: 141.6
