采用红外光谱(IR)、 X射线粉晶衍射（XRD）、 扫描电子显微镜(SEM)和差热分析(DTA)等测试， 分别从地开石的有序度。 矿物微形貌特征以及地开石中水的存在形式对水坑石透明度的影响因素进行了深入研究。 红外光谱和XRD测试结果显示样品主要矿物组成为地开石。 红外光谱中高频区3 704和3 621 cm-1两吸收峰的分裂程度和XRD图谱中2θ为19°~24°之间的衍射峰的分裂程度可表示地开石有序度， 分别计算样品红外光谱中3 704和3 621 cm-1两吸收峰的强度比值（OI）及XRD图谱中（111）晶面衍射峰和（111）晶面衍射峰的分裂程度指数（DHI）； 计算结果表明这两个表征有序度的参数与透明度并无密切关系。 扫描电镜测试结果显示地开石矿物晶体颗粒整体发育越均匀， 晶体颗粒形态越相近、 粒径大小越均一时， 样品透明度越高， 但晶体颗粒自身的结晶度、 自形程度和粒径的绝对大小与透明度并无关系。 差热分析测试结果表明水坑石的透明度与地开石晶体结构中结构水和吸附水的含量有关， 结构水含量越接近理论值， 样品晶体结构越完整， 透明度越高； 结构水的含量降低时， 部分羟基缺失导致晶体结构完整性下降， 结构单元层内部的电荷平衡被破坏， 层间域中吸附更多水分子， 吸附水在层间域中作为杂质分子存在， 使样品的透明度下降。

X-ray powder diffractometry (XRD), Infrared (IR) spectroscopy, Scanning electron microscope (SEM) and Differential thermal analysis (DTA) were used for studying the transparency in fluence factors of Shuikeng Stone from Shoushan, China. Results of IR spectroscopy and XRD indicated that the main mineral composition of Shuikeng Stone is Dickite. Order degree of Dickite can be indicated by intensity difference of wave number 3 704 and 3 621 cm-1 in IR spectroscopy and intensity difference of diffraction peaks in XRD pattern. Intensity ratio of wave number 3 704 and 3 621 cm-1 in IR spectroscopy (OI) was calculated, the result showed that OI has nothing to do with the transparency of the samples. DHI was calculated by intensity of diffraction peaks of crystallographic plane (111) and (111), the results showed that DHI also has nothing to do with transparency of samples. Results of SEM showed that the crystal particles in transparent samples show a uniform appearance and similar size and the crystallinitydegree of Dickite has nothing to do with its transparency. Results of DTA indicated that the adsorption water in transparent samples is less than that in opaque samples, and the constitution water in transparent samples is closer to the theoretical water content of kaolinite-group mineral than opaque samples. Deficiency of constitution water has caused the decline of structural integrity, accordingly, the charge balance of samples was destroyed. Adsorption water exists in crystal lattice of samples as impurity molecule because of the decrease in charge balance, these impurity molecules would decrease the transparency.