【摘要】 磷氯铅矿(Pyromorphite)在我国比较罕见,2001年在广西岛坪发现的磷氯铅矿结晶较好,运用XRD、XRFI、R和UV/Vis等分析方法对黄色和绿色样品进行了研究。结果表明,二者XRD谱只是峰强有所不同。在它们的红外吸收谱带中,除了标准的PO43-吸收峰外,在670~800 cm-1之间和430 cm-1左右出现的两组肩峰为SiO44-振动峰。黄色样品的振动频率偏高、半峰宽偏窄、透射率与绿色样品相比较高。通过XRF分析发现黄色晶体比绿色晶体含有更多的Fe3+,而Fe3+常使矿物呈现黄色,同时证实了黄色磷氯铅矿的红外吸收峰频率偏高是因为它的铅含量低于绿色矿。UV/Vis进一步说明在可见光区的吸收不同是使二者颜色差异的主要原因,Fe离子含量较大使磷氯铅矿呈现黄色。更多还原

【Abstract】 The mineral pyromorphite is very rare in China.The high quality pyromorphite was found in Guangxi in 2001.This paper analyzed the difference between green-and yellow-pyromorphite through XRD,XRF,IR and UV/Vis.The results showed that the peak strength is different in XRD.The vibrational frequency in IR of the yellow pyromorphite is higher,the half width of the peak is less and the transmittance is more.Vibrational peak of silicate is present by the shoulder peaks.More Fe³⁺ in the yellow pyromorphite is found by XRF.The result of XRF makes it sure that more Pb in the green mineral makes its vibrational frequency lower in IR.It is known that more Fe makes the pyromorphite show yellow color through UV/Vis spectra.更多还原