English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Optical absorption spectra of natural Co-bearing spinel and staurolite were studied at different temperatures and pressures. In both minerals, two broad, intense structured bands in the range 5500-8000 and 15 000-19 000 cm-1, caused by electronic spin-allowed transitions  4 A 2  →  4 T 1 (4F) and  4 A 2  →  4 T 1 ( 4 P) of  IV Co 2+  are the predominant absorption features. In addition, in both cases broad bands, derived from spin-allowed electronic transitions 4E → 4T2 of  IV Fe 2+ , appear in the near infrared range partly overlapping the bands caused by  IV Co 2+ . In staurolite the NIR range of the spectra are complicated by intense sharp lines of OH-vibrations at around 3400 cm -1 .

Optical spectroscopic study of tetrahedrally coordinated Co 2+ in natural spinel and staurolite at different temperatures and pressures