磷酸铝结合剂改性绿松石的结构特征

陈全莉; 袁心强; 陈敬中; 周金花

doi:10.3799/dqkx.2010.115

Volume 35 Issue 6

Jun. 2010

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CHEN Quan-li, YUAN Xin-qiang, CHEN Jing-zhong, ZHOU Jin-hua, 2010. Structural Characteristics of Turquoise Filled with Aluminum Phosphate Adhesive. Earth Science, 35(6): 1023-1028. doi: 10.3799/dqkx.2010.115

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CHEN Quan-li, YUAN Xin-qiang, CHEN Jing-zhong, ZHOU Jin-hua, 2010. Structural Characteristics of Turquoise Filled with Aluminum Phosphate Adhesive. Earth Science, 35(6): 1023-1028. doi: 10.3799/dqkx.2010.115

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Structural Characteristics of Turquoise Filled with Aluminum Phosphate Adhesive

doi: 10.3799/dqkx.2010.115

1.
Gemmology Institute, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China
3.
Gems and Jewelry Trade Association of Hubei Province, Wuhan 430000, China

Received Date: 2009-11-28
Publish Date: 2010-11-01

Abstract

Abstract

The quality grade, gemology characteristics, cutting and grinding processing of the loosen turquoises filled with aluminum phosphate adhesive are improved distinctly, and consequently they are similar with the natural turquoises. They can not be identified easily by gemmology testing methods. In order to verify the structure of this kind of modified turquoises and discuss the mechanism of the turquoises improved by the aluminium phosphate inorganic adhesive, the environmental scanning electron microscope (ESEM), thermogravimetric and thermal analysis (TG-DSC), infrared spectrum (IR) and X-ray powder diffraction (XRD) have been used to study the structural characteristics, phase, and thermal property of the turquoises filled with aluminum phosphate adhesive. It is indicated that the micro-pores of the turquoises after treatment are completely filled by aluminum phosphate adhesive as gelatinous, and the mineral composition and molecular structure of turquoises show no noticeable changes, but is amorphous in a degree. The amorphous structure is relevant with the filling of aluminum phosphate that is the inorganic polymer network structure forms when the aluminum phosphate adhesive is dehydrated. Moreover, the endothermic and exothermic reaction temperatures of the turquoises after treatment fall in certain degree than the natural ones caused by the addition of aluminum phosphate.
- turquoise,
- aluminum phosphate adhesive,
- structural analysis,
- X ray diffraction analysis,
- gems

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References

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Structural Characteristics of Turquoise Filled with Aluminum Phosphate Adhesive

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