Botryogen Visible Spectra (400 - 1300 nm)

Botryogen, MgFe(SO4)2(OH)·7H2O, contains an infinite hydroxy-bridged chain of ferric iron ions which cause strong pleochroism with intensity enhancement of the spin-forbidden ligand field absorption bands when the E-vector of the incident light is aligned with the direction of the Fe-OH-Fe chain.

Botryogen structure

Link to a reference to the visible spectroscopy of botryogen

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revised 23-Feb-2024