| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 2267 | [1] | K[HCO3] | P 2(1)/a |
| 2. | 5895 | [2], analogue | K[HH]CO3 | P 2(1)/a |
| 3. | 5896 | [3], at 0.2 GPa, analogue | K[HH]CO3 | P 2(1)/a |
| 4. | 5897 | [4], at 1.8 GPa, analogue | K[HH]CO3 | P 2(1)/a |
| 5. | 5898 | [5], at 2.3 GPa, analogue | K[HH]CO3 | P 2(1)/a |
| 6. | 5899 | [6], at 2.5 GPa, analogue | K[HH]CO3 | P 2(1)/a |