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Alkali-tourmaline group

[(Na,K)][ Y3 ][ Z6 ][ V3 |W|(BO3)3|(TO3)6]

Alkali-subgroup 1: [ Y2+3 ][ Z3+6 ][(OH)3]
Dravite
Schorl
Chromium-dravite
Vanadium-dravite
Fluor-dravite
Fluor-schorl
Tsilaisite
Fluor-tsilaisite
Luinaite-(OH)
Alkali-subgroup 2: [ Y+1.5Y3+1.5 ][ Z3+6 ][(OH)3]
Elbaite
Fluor-elbaite
Alkali-subgroup 3: [ Y3+3 ][ Z3+4Z2+2 ][(OH)3]
Povondraite
Chromo-alumino-povondraite
Maruyamaite
Oxy-dravite
Oxy-schorl
Oxy-chrominum-dravite
Oxy-vanadium-dravite
Vanadio-oxy-chromium-dravite
Vanadio-oxy-dravite
Alkali-subgroup 4: [ Y+Y3+2 ][ Z3+6 ][(OH)3]
Darrellhenryite
Alkali-subgroup 5: [ Y3+3 ][ Z3+6 ][O3]
Fluor-buergerite
Olenite
Alkali-subgroup 6
No member