Lattice Parameter

Total Energy (eV)

Bond Angle (˚)

Buckling Distance

(Å)

Bond Length

(Å)

Bond

Order

2D

Pr.

Ref.

Pr.

Ref.

Pr.

Ref.

Pr.

Ref.

G

2.46

2.46 [47]

−310.28844

120

120 [22]

1.42

1.42

3.05

Si

3.88

3.87 [23]

−213.55118

116.90

115.4 [22]

0.41

0.44 [23] [24]

2.27

2.30 [25] [26]

2.279 [27]

2.28 [28]

2.75

Ge

4.03

4.03 [25]

4.02 [13]

−213.79328

112.56

0.68

0.64 [24] [25]

0.689 [48]

2.42

2.44 [25] [29]

2.48 [48]

2.03

Sn

4.66

4.62 [38]

−190.06948

110.39

110 [38]

0.9

0.92 [38]

2.83

2.82 [38]

1.99