Table 1 Comparison between Pentagon Carbon and other representative carbon allotropes.

From: Three-dimensional Pentagon Carbon with a genesis of emergent fermions

System

Space Group

d (sp2)

d (sp3)

θ (sp2)

θ (sp3)

ρ

B

E coh

CKL

F63/MMC

 

1.53, 1.50

 

60.0, 115.1, 117.7

2.75

327

−8.81

Bcc C8

P4/MMM

 

1.52, 1.58, 1.59

 

90.0, 117.6, 139.1

2.97

343

−8.49

3D-C5

I41/amd

1.37, 1.44

1.53

109.7, 110.3, 140.1

100.1, 114.3

2.18

257

−8.79

T6

P42/MMC

1.34

1.54

115.1, 122.5

106.7, 115.1

2.95

350

−8.63

Diamond

 

1.54

 

109.5

3.55

431

−9.09

Graphite

F63/MMC

1.42

 

120

 

2.24

36

−9.22

  1. The table contains information of the space group, the bond length d (Å), the bond angle θ (°), the mass density ρ (g cm−3), the bulk modulus B (GPa) and the cohesive energy Ecoh (eV per atom).
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