| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 1198 | [24], t-diopside, Ni-analogue | CaNiSi2O6 | C 2/c |
| 2. | 3880 | [86], t-diopside, Ni, analogue | CaNi0.8Mg0.2Si2O6 | C 2/c |
| 3. | 3881 | [87], t-diopside, Ni, analogue | CaNi0.5Mg0.5Si2O6 | C 2/c |
| 4. | 3882 | [88], t-diopside, Ni, analogue | CaNi0.25Mg0.75Si2O6 | C 2/c |
| 5. | 3883 | [89], t-diopside, Ni, analogue | CaNiSi2O6 | C 2/c |