| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 1061 | [20], t-cristobalite-alpha, analogue | Na1.95Al1.95Si0.05O4 | P 4(1)2(1)2 |
| 2. | 1062 | [21], td-cristobalite-alpha, analogue, DF | Na1.75Al1.75Si0.25O4 | P bca |
| 3. | 1063 | [22], t-cristobalite-alpha, analogue | Na1.65Al1.65Si0.35O4 | P 4(1)2(1)2 |
| 4. | 1064 | [23], td-cristobalite-alpha, analogue, DF | Na1.55Al1.55Si0.45O4 | P bca |