Obrázek 711-11. Práškový RTG difrakční záznam sekaninaitu pro Co záření. Modelováno programem WinXpow.

Polohy a intenzity difrakčních maxim od strukturních rovin sekaninaitu, podle standardu databáze JCPDS pro Co záření.
| D | 2Theta | I(rel) | H K L |
| 8,630 | 11,90 | 70 | 2 0 0 |
| 8,550 | 12,01 | 70 | 1 1 0 |
| 4,950 | 20,82 | 1 | 3 1 0 |
| 4,090 | 25,27 | 70 | 2 0 2 |
| 3,390 | 30,60 | 100 | 3 1 2 |
| 3,380 | 30,69 | 60 | 0 2 2 |
| 3,160 | 32,89 | 25 | 4 0 2 |
| 3,140 | 33,10 | 45 | 2 2 2 |
| 3,070 | 33,88 | 50 | 5 1 1 |
| 3,060 | 33,99 | 50 | 4 2 1 |
| 3,040 | 34,22 | 35 | 1 3 1 |
| 2,877 | 36,23 | 6 | 6 0 0 |
| 2,843 | 36,68 | 6 | 3 3 0 |
| 2,666 | 39,21 | 20 | 5 1 2 |
| 2,658 | 39,33 | 20 | 4 2 2 |
| 2,648 | 39,49 | 10 | 1 3 2 |
| 2,479 | 42,30 | 10 | 6 2 0 |
| 2,456 | 42,72 | 12 | 0 4 0 |
| 2,421 | 43,37 | 2 | 3 3 2 |
| 2,395 | 43,86 | 4 | 6 2 1 |
| 2,367 | 44,41 | 4 | 2 4 0 |
| 2,324 | 45,27 | 12 | 0 0 4 |
| 2,317 | 45,42 | 6 | 7 1 1 |
| 2,300 | 45,77 | 2 | 5 3 1 |
| 2,289 | 46,01 | 2 | 2 4 1 |
| 2,241 | 47,05 | 6 | 4 2 3 |
| 2,187 | 48,28 | 12 | 6 2 2 |
| 2,172 | 48,64 | 4 | 0 4 2 |
| 2,132 | 49,61 | 4 | 4 4 0 |
| 2,124 | 49,81 | 6 | 7 1 2 |
| 2,113 | 50,09 | 6 | 5 3 2 |
| 2,105 | 50,29 | 8 | 3 1 4 |
| 2,100 | 50,42 | 4 | 0 2 4 |
| 2,040 | 52,01 | 4 | 2 2 4 |
| 1,968 | 54,07 | 2 | 7 3 0 |
| 1,951 | 54,58 | 2 | 1 5 0 |
| 1,914 | 55,72 | 4 | 1 5 1 |
| 1,892 | 56,43 | 6 | 7 1 3 |
| 1,883 | 56,72 | 10 | 1 3 4 |
| 1,879 | 56,85 | 8 | 2 4 3 |
| 1,868 | 57,22 | 4 | 6 4 0 |
| 1,858 | 57,56 | 4 | 3 5 0 |