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| 1 | Raman and FTIR spectroscopy of natural oxalates: Implications for the evidence of life on Mars显示文摘Evidence for the existence of primitive life forms such as lichens and fungi can be based upon the for-mation of oxalates. Oxalates are most readily detected using Raman spectroscopy. A comparative study of a suite of natural oxalates including weddellite, whewellite, moolooite, humboldtine, glushinskite, natroxalate and oxammite has been undertaken using Raman spectroscopy. The minerals are characterised by the Raman position of the CO stretch-ing vibration which is cation sensitive. The band is observed at 1468 cm-1 for weddellite, 1489 cm-1 for moolooite, 1471 cm-1 for glushinskite and 1456 cm-1 for natroxalate. Except for oxammite, the infrared and Raman spectra are mutually exclusive indicating the minerals are bidentate. Differences are also observed in the water OH stretching bands of the minerals. The significance of this work rests with the ability of Raman spectroscopy to identify oxalates which often occur as a film on a host rock. As such Raman spectroscopy has the potential to identify the existence or pre-existence of life forms on planets such as Mars. | R.L.Frost YANGJing ZheDing | 2003 | Chinese Science Bulletin2003，48，17： | 2 |
| 2 | 草酸盐矿物的Raman和红外光谱特征研究:寻找行星生命的有效方法显示文摘草酸盐矿物的形成可以用来证明苔藓、真菌等低级生物的存在。系统研究了一水草酸钙石、二水草酸钙石、草酸铜石、草酸铁石、草酸镁石、草酸钠石和草酸胺石等7种草酸盐矿物的Raman和红外光谱特征。研究表明,草酸盐矿物的CO Raman伸缩振动峰与阳离子种类有关,二水草酸钙石、草酸铜石、草酸镁石、草酸钠石的CO Raman伸缩振动峰依次是1468,1489,1471,1456cm^(-1)。除草酸胺石外,只有Raman和红外光谱特征能够证明这些草酸盐矿物的络合特性。还对水的OH伸缩振动的光谱学特征进行了测定和分析,用来区分草酸钙石中是否含有结晶水及结晶水的含量。结果的重要性在于可以用振动光谱技术来鉴定赋存在岩石表层的草酸盐矿物,从而用于证明其他行星(如火星)上是否有生命或曾经有生命存在。 | R.L.Frost 杨静 Z.Ding | 2003 | 科学通报2003，48，12： | 2 |
| 3 | 埃洛石喇曼微探针光谱学研究显示文摘分布在新西兰马特里海湾的管柱状埃洛石矿物的喇曼光谱可通过 Renishaw 1000喇曼光谱显微镜系统获得。在完整波长范围内,利用喇曼微探针可获得直径仅0.8μm 晶体的喇曼光谱,并可以研究光谱沿不同晶轴方向产生的特定振动。观测到的羟基衍生物的3个频带分别是3616.5cm^(-1)、3623.4cm^(-1)和3629.7cm^(-1),3个频带与埃洛石八面体底部同界面内部烃基之间有密切联系。3698.2 cm^(-1)和3705cm^(-1)的两个频带对应于八面体晶体外部不同界面的羟基。3629.7cm^(-1)频带的相对密度沿埃洛石晶轴倾向产生变化。试验研究还表明,埃洛石的晶格变化也与晶轴倾向有密切关系。 | R.L.Frost H.F.Shurvell 李星军 冯子辉 刘孟芳 | 1998 | 地质科学译丛1998，15，1： | 0 |
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