NN | Card | Specie | Formula | Space Group |
---|---|---|---|---|
1. | 6237 | [9], t-tourmaline | (Na,Ca)0.98(Mg,Fe,Al)3(Al,Mg)6[BO3]3Si6O18(OH,F)4 | R 3m |
2. | 7563 | [10], t-tourmaline | (Na,Ca)0.96(Mg,Fe,Al)3(Al,Mg)6[BO3]3Si6O18(OH,F)4 | R 3m |
3. | 7564 | [11], t-tourmaline | (Na,Ca)0.94(Mg,Fe,Al)3(Al,Mg)6[BO3]3Si6O18(OH,F)4 | R 3m |