Hellandite

hellandite

hellandite-(Ce)

hellandite-(Y)

inosilicate

Images

Formulae:
Hellandite-(Ce): (Ca,REE)4Ce2Al☐2(B4Si4O22)(OH)2
Hellandite-(Y): (Ca,REE)4Y2Al☐2(B4Si4O22)(OH)2
Inosilicates (chain silicates)

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