“黄蜂石”的矿物成分及谱学特征研究

doi:10.3964/j.issn.1000-0593(2021)06-1936-06

Abstract
References
Related Citation (15)

Download: PDF (3091 KB)
Export: BibTeX | EndNote (RIS)

Abstract Recently, a kind of jade with yellow and black stripes appeared in the Liwan jewelry market in Guangzhou. It is called “Bumblebee stone” because of its patterns. The stripe structure of “Bumblebee stone” is similar to that of Sardonyx, which is easy to be confused. In this paper, the “Bumblebee stone” was determined by a petrographic microscope, X-ray diffraction, electron probe micro analysis, Fourier transform infrared spectroscopy and Raman spectroscopy, and the basic Basic physical properties, mineral composition and spectral characteristics were studied. The results showed that the color of “Bumblebee stone” was mainly gray, yellow, orange and black, with a hardness of 3~5 and a relative density of 2.58~2.73. It has weak yellow fluorescence under long wave ultraviolet light and releases gas by reacting with dilute hydrochloric acid. Microscopic petrographic analysis showed that the matrix mineral of “Bumblebee stone” was calcite an irregular and granular fibrous, with a particle size of 0.02~0.3 mm. CaO, FeO and MgO content in “Bumblebee stone” was 53.64%~56.66%, 2.23%~3.62% and 1.05%~1.79%, respectively. As and S element were found in some test points. The mol percentage of Mg/Ca in the sample was 2.59%~4.68%, which was low magnesium calcite. Fourier transform infrared spectroscopy analysis showed that the main characteristic peak of “Bumblebee stone” coincides with the theoretical value of carbonate minerals, namely 1 514, 1 427, 881, 710 cm^-1, which caused by asymmetric stretching vibration, in-plane bending vibration and out-of-plane bending vibration of CO^2-₃. There are characteristic peaks of pyrite in the black part of “Bumblebee stone”, of which 1 123, 1 050 cm^-1 is S-S stretching vibration and 423 cm^-1 is Fe²⁺-[S₂]^2- stretching vibration. Raman analysis showed that the yellow part of the “Bumblebee stone” sample have both the calcite Raman shifts of 1 083, 713, 282 and 157 cm^-1, and pararealgar Raman peaks of 346, 233, 184 cm^-1. Besides, the orange-red part of the “Bumblebee stone” sample showed the Raman characteristic peaks of realgar at 338, 221 and 184 cm^-1, which were caused by S-AS-S stretching vibration, S-As-S bending vibration combined with As-S stretching vibration, and As-As stretching vibration, respectively. The results of X-ray powder diffraction are consistent with those of infrared absorption spectrometry analysis and Raman spectrometry analysis, showing that the main mineral of “Bumblebee stone” is calcite, and the secondary minerals are pyrite, realgar and pararealgar. According to the national standards, it can be named “Carbonate jade”.

Key words：“Bumblebee stone”; Mineral composition; X-ray diffraction; Electron probe micro analysis; Raman spectroscopy

Received: 2020-06-18 Accepted: 2020-09-29

ZTFLH:

P575

Corresponding Authors: LUO Jie E-mail: luojie1717@163.com

Cite this article:

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2021)06-1936-06 OR https://www.gpxygpfx.com/EN/Y2021/V41/I06/1936