التفاصيل البيبلوغرافية
| العنوان: |
Study on the correlation between trace elements and colorimetric parameters of natural blue sapphire. |
| المؤلفون: |
Zhou, Danyi, Lu, Taijin, Zhang, Jian |
| المصدر: |
Color Research & Application; Jun2022, Vol. 47 Issue 3, p691-696, 6p |
| مصطلحات موضوعية: |
LASER ablation inductively coupled plasma mass spectrometry, INDUCTIVELY coupled plasma mass spectrometry, TRACE elements, SAPPHIRES |
| مستخلص: |
Natural blue sapphire is a gem species of corundum, which has high economic value due to its beauty and rarity. Color is the most important factor affecting the price of sapphire and mainly caused by trace elements. However, there is little quantitative data currently available to demonstrate the correlation between trace elements and colorimetric parameters of natural blue sapphire. In this study, the UV‐Vis‐NIR spectra and colorimetric parameters were collected by UV‐Vis‐NIR spectrophotometer while the chemical composition was analyzed by laser‐ablation inductively coupled plasma mass spectrometry. The results show that the content ratio of (FeOT + TiO2)/MgO has negative correlation with b* but positive correlation with Cab*, illustrating its obvious effect on the blue color saturation of natural blue sapphire. In addition, the existence of Cr can produce purple hue and the content of Cr shows positive correlation with hue‐angle hab only in the low range (5‐15 ppm), which implies the content of Cr has a limited influence on the hue of natural blue sapphire and the effect may be more complicated as the content of Cr increases above 15 ppm. This investigation can provide quantitative data for scientific color grading and additional applications of natural blue sapphire. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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