NN | Card | Specie | Formula | Space Group |
---|---|---|---|---|
1. | 4132 | [3], t-tourmaline | (Na,K,Ca)0.94(Fe,Al,Mg)3Al6B3Si6O27(F,OH)4 | R 3m |
2. | 4133 | [4], t-tourmaline | (Na,K,Ca)0.85(Fe,Al,Ti)3(Al,Mg)6B3Si6O27(F,OH)4 | R 3m |
3. | 4134 | [5], t-tourmaline | (Na,K,Ca)0.59(Fe,Al,Mg,Ti)3(Al,Mg)6B3Si6O27(F,OH)4 | R 3m |
4. | 6372 | [6], t-tourmaline | (Na,K,Ca)0.80(Fe,Al)3Al6B3Si6O27(OH,F)4 | R 3m |