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Can I read Color Origin of Greyish-Purple Tremolite Jade from Sanchahe in Qinghai Province, NW China on EtoBox?
Color Origin of Greyish-Purple Tremolite Jade from Sanchahe in Qinghai Province, NW China by Nina Gong; Chaowen Wang; Shuai Xu is a Earth and Planetary Sciences article available to read on EtoBox.
What is Color Origin of Greyish-Purple Tremolite Jade from Sanchahe in Qinghai Province, NW China about?
Greyish-purple tremolite jade has become well known in the past few years, and the origin of its color has attracted the attention of gemologists. In this study, FT-IR spectra, EPMA, EPR spectra, micro-XRF, UV–Vis–NIR spectra, and LA-ICP-MS in situ mapping were analyzed to investigate the chromophore elements. The study sample was chosen from the Sanchahe mine, Qinghai Province, NW China, which has the typical characteristics of a gradual color change. The FT-IR and EPMA results revealed that the mineral composition of the dark and light greyish-purple regions of the sample are primarily composed of tremolite. UV–Vis–NIR spectra demonstrated that the greyish-purple color is mainly due to strong absorptions at 560 nm and 700 nm and weak absorption at 745 nm in the visible range. The EPR spectra presented ~3400 G six hyperfine lines resulting from the hyperfine interactions of the unpaired electron with the Mn2+ nucleus in the octahedral site. The UV–Vis–NIR and EPR spectra analyses demonstrated that Mn2+ is the origin of the purple color. A comparison of the major elements in the light and dark regions indicated that the chromogenic elements have strong positive correlations with Mn
Who reads Color Origin of Greyish-Purple Tremolite Jade from Sanchahe in Qinghai Province, NW China?
It is typically read by researchers, students, and practitioners in Earth and Planetary Sciences.
- Author
- Nina Gong; Chaowen Wang; Shuai Xu
- Publisher
- MDPI AG
- Published
- 2023
- Language
- EN
- Field
- Earth and Planetary Sciences (Physical Sciences)