Ringwoodite Visible Spectra (350 - 1050 nm)
Ringwoodite 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 20K; Data
taken avoiding the inclusion 19K;
- Keppler et al. (2005) spectrum; presented for 1 mm thickness. This spectrum is similar to the previous spectrum in the regions of overlap.
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