Characterization of Mexican Amber from the Yi Kwan Tsang Collection

Villani, Vittoria L.; Caucia, Franca; Marinoni, Luigi; Leone, A.; Brusoni, Maura; Groppali, Riccardo; Corana, Federica; Ferrari, Elena; Galli, C.

doi:10.15506/jog.2017.35.8.752

Cited by 1 publication

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“…López-Morales et al studied Chiapas amber [12], they reported that refractive index determination and fluorescence spectroscopy are valuable techniques to identify fake amber, recommending to use Raman spectroscopy as a direct method to identify amber counterfeit. Villani et al characterized mexican amber [13] using gemological analysis, X-ray diffraction, FTIR and secondary ion mass spectrometry; XRD results shown an amorphous pattern accompanied by traces of refikite (C 19 H 31 COOH), hartite (C 20 H 34 ) and calcite (CaCO 3 ). Mass spectrometry results showed that mexican amber lacks succinic acid.…”

Section: Introductionmentioning

confidence: 99%

Is sulfur the responsible for color of yellow Chiapas Amber?

Bautista

Torres²,

Chalé-Lara

et al. 2021

Superficies y Vacio

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Amber is a fossilized natural resin found in specific areas of the world; its geographical origin is associated to a characteristic color. Amber all over the world share basic characteristics due to a common polymeric matrix; however, its color is associated to the environment where it was formed. In this work, based on a compositional analysis, it is proposed that yellow color of Mexican amber is originated from the sulfur physical and chemical interaction within its polymeric matrix. The effect of sulfur present in yellow Mexican amber is studied by employing X-ray photoelectron and UV-Vis spectroscopies. Results show that sulfur is incorporated inside the polymer matrix with two different chemical environments; one related with sulfur-carbon bonds and the other with sulfur-sulfur bonds. The optical transmission spectrum simulated considering amber as a composite material reproduce the scattering contribution observed experimentally.

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Section: Introductionmentioning

confidence: 99%