| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 1089 | [1], td-hollandite | (K,Na)2(Mn,Fe)8O16 · 0.16H2O | I 4/m |
| 2. | 1090 | [2], t-hollandite, at 710oC | (K,Na)2(Mn,Fe)8O16 | I 2/m |
| 3. | 5739 | [3], td-hollandite, syn | K0.54Mn8O16 · 1.48H2O | I 4/m |
| 4. | 6824 | [4], t-hollandite, syn, DN | K1.33(Mn4+,Mn2+)8O16 | I 4/m |