摘要
球文石 (Vaterite)是CaCO3 很不稳定的同质多象变体 ,在自然界里很少出现 ,通过光学显微镜在淡水无光珠中发现球文石尚属首次。本文研究了淡水无光珠内球文石的显微特征、X射线粉晶衍射特征及显微红外光谱特征。研究结果表明淡水无光珍珠内球文石粉晶衍射由强至弱五个强峰的d值为 0 .3 2 66,0 .2 72 3 ,0 .3 553 ,0 .1 81 1 ,0 .2 0 57nm ;其红外光谱特征波数为 1 4 89,1 4 50 ,1 4 2 0 ,1 0 87,1 0 50 ,876,83 0 ,762 ,74 3cm-1。球文石的存在是影响淡水珍珠品质的主要内在因素之一。
Vaterite is a very unstable polymorphism of calcium carbonate, rarely appears in nature. This is the first time to discover vaterite in lusterless fresh\|water pearls by optical microscopy. The present paper describes the microscopic characteristics of vaterite in lusterless fresh\|water pearl, and presents its X\|ray powder diffraction and microscopic infrared spectroscopy data. The content of vaterite is the main factor that affects the quality of fresh\|water pearls. The X\|ray diffraction (d) data of vaterite mainly are \{3.266\}, \{2.723\}, \{3.553\}, \{1.811\} and \{2.057\}. The IR spectroscopic wavenumbers are \{1489\}, \{1450\}, \{1420\}, \{1087\}, \{1050\}, 876, 830, 762 and 743 cm\+\{-1\}.
出处
《矿物学报》
CAS
CSCD
北大核心
2001年第2期153-157,共5页
Acta Mineralogica Sinica
基金
广西大学科研基金项目
