Gleysol and ferralsol samples were collected at Dimako (Eastern Cameroon) to investigate their use as raw materials in the ceramic industry, using petrological and physicochemical approach. Field and analytical investigations reveal that gleysols are grey-white with sandy clay textures. The organic carbon contents are low in both soil types. These soils are characterized by low cation exchange capacity (CEC) contents (3–5.40 cmol(+)/kg). The mineral assemblage of gleysols comprises quartz and kaolinite with few amounts of anatase and zircon. In ferralsols, the mineralogical composition is quartz, kaolinite, and hematite with accessory anatase, gibbsite, goethite, and zircon. The Fourier-transform infra-red (FT-IR) spectra confirm the presence of kaolinite with ordered structure. Gleysols are richer in SiO₂ than ferralsols. However, gleysols are less enriched in Al₂O₃ than ferralsols. Fe₂O₃ contents are lower in gleysols (av. = 0.93 wt% at Koba and 1.69 wt% at Dimako) than in ferralsols (6.21–8.79 wt%). The abundance of quartz and kaolinite exhibits low contents in other major elements and several trace elements (including rare-earth elements (REE)) except Zr, Sr, and Ba in some samples. The normalized REE patterns relative to parent rocks (gneisses and granites) and chondrite reveal negative and positive Ce anomalies, strong negative Eu anomalies, and intense REE fractionation. Both soils result from the intense chemical weathering of gneisses and granites under tropical humid climate. Technological properties (color, grain size distribution, linear shrinkage, water absorption, and flexural strength) increase with the firing temperature, from 1000 to 1200 °C. Petrological and technological features highlight that gleysols are inorganic clays appropriate for refractory bodies and white stoneware tiles.

在喀麦隆东部的迪马科（Dimako）收集了Gleysol和Ferralsol样品，以岩石学和物理化学方法研究了它们在陶瓷工业中的用途。野外和分析研究表明，水溶胶为灰白色，带有沙质粘土质地。在两种土壤类型中，有机碳含量均较低。这些土壤的特点是阳离子交换容量（CEC）含量低（3-5.40 cmol（+）/ kg）。悬浮液的矿物组合包括石英和高岭石以及少量的锐钛矿和锆石。在铁硅溶胶中，矿物成分为石英，高岭石和赤铁矿，并带有锐钛矿，菱镁矿，针铁矿和锆石。傅立叶变换红外（FT-IR）光谱证实了具有有序结构的高岭石的存在。气溶胶富含SiO ₂比铁硅土。但是，与铁铝溶胶相比，水溶胶在Al ₂ O _3中的富集程度较低。铁₂ O ₃甘露中的镁含量较低（科巴平均为0.93 wt％，迪马科平均为1.69 wt％）比铁铝溶胶（6.21-8.79 wt％）低。丰富的石英和高岭石在其他主要元素和某些痕量元素（包括稀土元素（REE））中的含量较低，一些样品中还不含Zr，Sr和Ba。相对于母体岩石（片麻岩和花岗岩）和球粒岩的归一化REE模式显示出Ce异常为正和负，Eu异常为负，并且REE分馏强烈。两种土壤均来自热带湿润气候下片麻岩和花岗岩的强烈化学风化。技术性能（颜色，晶粒尺寸分布，线性收缩，吸水率和抗弯强度）随着烧成温度（从1000到1200°C）的增加而增加。