Helvine Group

danalite

genthelvite

helvine

tugtupite

The helvine group includes:

danalite:
Be₃Fe²⁺₄(SiO₄)₃S
genthelvite:
Be₃Zn₄(SiO₄)₃S
helvine:
Be₃Mn²⁺₄(SiO₄)₃S
tugtupite:
Na₄BeAlSi₄O₁₂Cl

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