a* | 0 | 0 | 0 | 0 |
0 | −C22 | C23 | C22 | −C25 |
0 | C25 | 4r | −C25 | 2r |
0 | C22 | C25 | −C22 | C25 |
0 | C25 | 2r | −C25 | 4r |