Point Group C
1v
Quaternary direct products
A
1
⊙A
1
⊙
⊙
A
1
A
2
A
1
A
1
A
2
A
2
A
1
A
1
⊙A
2
⊙
⊙
A
2
A
2
A
2
A
2
⊙A
2
⊙
⊙
A
2
A
2
A
1