NN | Card | Specie | Formula | Space Group |
---|---|---|---|---|
1. | 4133 | [4], t-tourmaline | (Na,K,Ca)0.85(Fe,Al,Ti)3(Al,Mg)6B3Si6O27(F,OH)4 | R 3m |
2. | 4134 | [5], t-tourmaline | (Na,K,Ca)0.59(Fe,Al,Mg,Ti)3(Al,Mg)6B3Si6O27(F,OH)4 | R 3m |
3. | 9908 | [10], t-tourmaline | (Na,Ca)0.7(Fe2+,Al,Ti)3Al6(Si,Al)6O18[BO3]3(OH,F)4 | R 3m |