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Volume 7 Issue 3
Sep.  2005
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ZHANG Gang-sheng, DING Shi-lei, JIA Tai-xuan, HAO Yu-lan. Unusual Characteristics of FTIR Spectra of Aragonites from Nacreous Layers of Pearls and Bivalve Shells[J]. Journal of Gems & Gemmology, 2005, 7(3): 7-9.
Citation: ZHANG Gang-sheng, DING Shi-lei, JIA Tai-xuan, HAO Yu-lan. Unusual Characteristics of FTIR Spectra of Aragonites from Nacreous Layers of Pearls and Bivalve Shells[J]. Journal of Gems & Gemmology, 2005, 7(3): 7-9.
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Unusual Characteristics of FTIR Spectra of Aragonites from Nacreous Layers of Pearls and Bivalve Shells

  • College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China

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  • Received Date: June 26, 2005
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    • Abstract
  • The FTIR spectra of aragonites from different origins, which include aragonites from nacreous layers of pearls and bivalve shells, coral skeletons and natural inorganic aragonites, are measured and comparatively analyzed. The results show that the ν2 vibrational frequency of aragonites from nacreous layer has the mean value of 863.6 cm(-1 )which is about 7.9 cm-1and 9.1 cm-1, higher than that of aragonite from coral skeleton and natural inorganic aragonite respectively. The unusual characteristics of ν2 vibrational frequency of aragonites from nacreous layer is probably resulted from the low crystallinity, crystal lattice distortion and nanometer size of aragonites.
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    • References (6)
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