Ringwoodite spectra

Ringwoodite Visible Spectra (350 - 1050 nm)

Ringwoodite, ideally, Mg₂SiO₄, is well known as a synthetic mineral and also has been found as a naturally occuring phase. It often has a blue color as seen in this synthetic ringwoodite, sample SZ9901 from Smyth et al. (2003). The color comes from Fe²⁺-Fe³⁺ intervalence charge transfer.

The ringwoodite absorption spectrum

SJ-111b spectrum; synthetic crystal, 0.047 mm thick (detailed in Jacobsen et al., 2004) The black trace is through the full thickness of the sample. The sample is nearly opaque and gives poor data. The blue trace is through an inclusion in the sample that effecively decreases the thickness through which the data are obtained. The blue color color of this substance comes from its iron content. Data Files: Data taken through the inclusion; Data taken avoiding the inclusion;

Keppler et al. (2005) spectrum; presented for 1 mm thickness. This spectrum is similar to the previous spectrum in the regions of overlap.

Link to references about the spectra of ringwoodite

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last upgraded 8-July-2022