Obrázek 79-42. Práškový RTG difrakční záznamy sillimanitu pro Co záření. Modelováno programem WinXpow.

Polohy a intenzity difrakčních maxim od strukturních rovin sillimanitu, podle standardu databáze JCPDS pro Co záření.
| D | 2Theta | I(rel) | H K L |
| 5,366 | 19,19 | 12 | 1 1 0 |
| 4,575 | 22,55 | 2 | 1 0 1 |
| 3,839 | 26,95 | 14 | 0 2 0 |
| 3,743 | 27,65 | 3 | 2 0 0 |
| 3,415 | 30,37 | 100 | 1 2 0 |
| 3,366 | 30,82 | 35 | 2 1 0 |
| 3,196 | 32,51 | 1 | 0 2 1 |
| 2,939 | 35,44 | 1 | 1 2 1 |
| 2,907 | 35,84 | 1 | 2 1 1 |
| 2,886 | 36,11 | 7 | 0 0 2 |
| 2,680 | 38,99 | 16 | 2 2 0 |
| 2,542 | 41,20 | 20 | 1 1 2 |
| 2,430 | 43,20 | 3 | 2 2 1 |
| 2,421 | 43,37 | 20 | 1 3 0 |
| 2,373 | 44,29 | 1 | 3 1 0 |
| 2,307 | 45,63 | 2 | 0 2 2 |
| 2,289 | 46,01 | 6 | 3 0 1 M |
| 2,233 | 47,23 | 1 | 1 3 1 |
| 2,204 | 47,89 | 30 | 1 2 2 |
| 2,193 | 48,14 | 4 | 3 1 1 M |
| 2,112 | 50,11 | 12 | 2 3 0 |
| 2,092 | 50,63 | 1 | 3 2 0 |
| 1,984 | 53,61 | 1 | 2 3 1 |
| 1,965 | 54,15 | 2 | 3 2 1 M |
| 1,872 | 57,10 | 2 | 4 0 0 |
| 1,864 | 57,36 | 1 | 1 0 3 |
| 1,857 | 57,60 | 2 | 1 4 0 M |
| 1,833 | 58,42 | 2 | 3 1 2 |
| 1,820 | 58,89 | 2 | 0 4 1 M |
| 1,786 | 60,10 | 2 | 3 3 0 |
| 1,769 | 60,74 | 1 | 1 4 1 |
| 1,707 | 63,20 | 14 | 2 4 0 M |
| 1,694 | 63,75 | 2 | 3 2 2 |
| 1,682 | 64,25 | 3 | 4 2 0 |
| 1,677 | 64,49 | 1 | 1 2 3 |
| 1,670 | 64,75 | 1 | 2 1 3 |
| 1,598 | 68,07 | 12 | 0 4 2 |
| 1,570 | 69,45 | 1 | 4 0 2 |
| 1,563 | 69,82 | 6 | 2 2 3 M |