| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 2654 | [1], Mg, Al, t-ludwigite | Mg2.11Al0.33Fe0.53Ti0.05Sb0.01BO5 | P bam |
| 2. | 2655 | [2], Mg, Mn, t-ludwigite | Mg1.93Mn1.07O2BO3 | P bam |
| 3. | 2656 | [3], Co-analogue, t-ludwigite | Co3O2BO3 | P bam |
| 4. | 2657 | [4], t-ludwigite | (Mg,Fe)2(MgO)4[BO3]2 | P bam |
| 5. | 2658 | [5], t-ludwigite | Mg2FeBO5 | P bam |
| 6. | 5453 | [6], t-ludwigite | [Mg1.97Fe0.03][Fe0.72Ti0.22Al0.1][BO3]O2 | P bam |
| 7. | 6571 | [7], Mn, t-ludwigite | Mg2(Fe,Mn,Al)BO5 | P bam |