Trimer

Source of data

α, deg

d, Å

Eb, eV

Si3

Our method

≈80

2.1

3.7

Other calculations

77.8a

78.10c

79.6e

2.26b

2.177c

2.51b

2.93d

Al3

Our method

60

2.3

2.4

Other calculations

60f

60h

2.50f

2.55h

1.74g

1.96f

С3

Our method

180

1.2

7.0

Other calculations

180i

180j

1.29c

1.3j

1.316k

6.8i

5.0k