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通过对徐闻、三水、高州等地五个样品的X射线衍射分析、化学全分析，发现它们为含铁量不同的蒙脱石，层间可交换阳离子主要为Ca2+。几个作品穆斯堡尔谱表明使主要以Fe3+的形式存在。含铁量较高的样品XGA、XSA、SS的话可以拟合出Fe3+的二对四极双峰，表明铁在蒙脱石中占据两种不等同的八面体位置。
Through X-ray diffraction analysis and chemical full analysis of five samples in Xuwen, Sanshui and Gaozhou, they were found to be montmorillonite with different iron content, and the interlayer exchangeable cation is mainly Ca2 +. Several works Mossbauer spectroscopy shows that the main form exists in the form of Fe3 +. The high-iron content samples XGA, XSA, SS can fit the two-to-four quadrupole double peaks of Fe3 +, indicating that iron occupies two unequal octahedral positions in montmorillonite.