Yuan ZHONG, Meng-wen QU, Hsitien Shen Andy. Comparison of Chemical Composition and Spectroscopy of Purple-Brownish Red Garnet From Zambia, Tanzania and Australia[J]. Spectroscopy and Spectral Analysis, 2022, 42(1): 184
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 1, 184 (2022)
Fig. 1. Garnet samples from three localities
A1—A14: Samples from Australia; T1—T5: Samples from Tanzania; ZP1—ZR222: Samples from Zambia
A1—A14: Samples from Australia; T1—T5: Samples from Tanzania; ZP1—ZR222: Samples from Zambia
Fig. 2. Samples from three localities plotted according to different pairs of chemical components
(a): MgO; (b): Co; (c): CaO; (d): Li
(a): MgO; (b): Co; (c): CaO; (d): Li
![Chondrite-normalized REE patterns of garnets from three localitiesChondrite data cited from Ref. [8]](/Images/icon/loading.gif){kind=icon}
Fig. 3. Chondrite-normalized REE patterns of garnets from three localities
Chondrite data cited from Ref. [8]
Chondrite data cited from Ref. [8]
Fig. 4. Raman spectra of several samples
ZP222: Zambia; T3: Tansania; A4: Australia
ZP222: Zambia; T3: Tansania; A4: Australia
Fig. 5. Colors of garnets from three localities distributed in L*a*b* color space (only a *, b * coordinates were drawn)
Fig. 6. UV-Vis spectrum of garnets from three localities
(a): Group ZP from Zambia; (b): Group ZR from Zambia; (c): Group from Tanzania; (d): Group from Australia
(a): Group ZP from Zambia; (b): Group ZR from Zambia; (c): Group from Tanzania; (d): Group from Australia
Fig. 7. Linear Regression of ratio between absorbanceat 368 and 503 nm (a) and b *, and linear Regression of ratio between absorbanceat 425 and 503 nm and b * (b)
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Table 1. Range of chemical components in garnet samples from three localities
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Table 2. Coefficients of different element variables in canonical discriminant functions and standard canonical discriminant functions
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Table 3. Vibration modes of different Raman peaks and wavenumber ranges of Raman peaks of samples from different localities(peaks are consistent with Fig.4 )
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Table 4. Pearson correlation coefficients between wavenumber of Raman peaks and content of chemical components
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Table 5. UV-Vis absorption bands and their color-causing ions and energy level transitions
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