Near Infrared Spectroscopy of the Smithsonite Minerals
| العنوان: | Near Infrared Spectroscopy of the Smithsonite Minerals |
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| المؤلفون: | Matthew C. Hales, B. Jagannadha Reddy, Daria L. Wain, Ray L. Frost |
| المصدر: | Journal of Near Infrared Spectroscopy. 16:75-82 |
| بيانات النشر: | SAGE Publications, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Smithsonite, Materials science, Absorption spectroscopy, Molecular vibration, X-ray crystallography, Near-infrared spectroscopy, engineering, Analytical chemistry, engineering.material, Absorption (electromagnetic radiation), Spectroscopy, Spectral line, Ion |
| الوصف: | The importance of NIR spectroscopy has been successfully demonstrated in the present study of smithsonite minerals. The fundamental observations in the NIR spectra, in addition to the anions of OH−and CO32–, are Fe and Cu in terms of cation content. These ions exhibit broad absorption bands ranging from 13,000 cm−1to 7000 cm−1(770 nm to 1430 nm). One broad diagnostic absorption feature centred at 9000 cm−1(1110 nm) is the result of ferrous ion spin allowed transition, (5T2g→5Eg). The splitting of this band (> 1200 cm−1) is a common feature in all the spectra of the studied samples. The light green coloured sample from Namibia show two Cu(II) bands in NIR at 8050 cm−1and 10,310 cm−1(1240 nm and 970 nm) assigned to2B1g→2A1gand2B1g→2B2gtransitions. The effects of structural cations substitution (Ca2+, Fe2+, Cu2+, Cd2+and Zn2+) on band shifts in the electronic spectral region of 11,000 cm−1to 7500 cm−1(910 nm to 1330 nm) and vibrational modes of OH−and CO32–anions in the 7300 cm−1to 4000 cm−1(1370 nm to 2500 nm) region were used to distinguish between the smithsonites. |
| تدمد: | 1751-6552 0967-0335 |
| DOI: | 10.1255/jnirs.765 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d002a96c39a78aea7783f75fd81c466b https://doi.org/10.1255/jnirs.765 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........d002a96c39a78aea7783f75fd81c466b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17516552 09670335 |
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| DOI: | 10.1255/jnirs.765 |