Spectroscopy and Spectral Analysis, Volume. 29, Issue 1, 131(2009)
XRD and FTIR Spectra Characteristics of Nacreous Layer in Perna Viridis
The XRD and FTIR of aragonites in nacreous and prismatic layer of perna viridis were systematically measured,and the frequency variations of ν1,ν2 and ν4 band of aragonites were especially analyzed.The results showed that both of them were aragonite and the frequency of ν2 band differed in them,but the frequencies of other two bands were not altered and had the same values with cavernous aragonite.In the same specie of shell,the frequency of ν2 band in nacreous layers was greater than that in prismatic layers,and there was a frequency shift of ν2 band between them.For the first time,the phase transformation of biogenic aragonite was detected.After nacreous aragonite was heated at 300 ℃,the frequency shift of ν2 band was found.So it is concluded that the biogenic aragonite is related to the thermal effects in crystallizing process,meanwhile it stores excess energy.All of these can provide experiential basis for studying biomineralization theory.
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JIA Tai-xuan, LIU Zi-li, ZHANG Gang-sheng. XRD and FTIR Spectra Characteristics of Nacreous Layer in Perna Viridis[J]. Spectroscopy and Spectral Analysis, 2009, 29(1): 131
Received: Sep. 6, 2007
Accepted: --
Published Online: Dec. 9, 2009
The Author Email: Tai-xuan JIA (gzdxlzl@163.com)