Ferric-ferronyböite

Formula:  NaNa2(Fe,Mg)3(Fe,Al)2(Si7Al)O22(OH)2

Origin of name:   From iron (Latin ferrium) and nyböite

 

Crystal system:   Monoclinic

Crystal class:   2/m

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Comments:   Series with ferric-nyböite and with ferronyböite

 

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