Grimaldiite (α-CrOOH) was precipitated hydrothermally from the CrCl₃ aqueous solution in the presence of hexamethylenetetramine (HMTA). The crystallite size of grimaldiite samples was estimated to be ~ 2 nm. Eskolaite (α-Cr₂O₃) was produced by the calcination of grimaldiite at 500 and 700 °C. FE-SEM images showed amorphous-like aggregates of grimaldiite due to very fine particles (crystallites), whereas eskolaite was in the form of sphere-like nanoparticles. Synthesized grimaldiite and eskolaite were used in the investigation of rhodamine B (RhB) degradation. The significant degradation percentage of RhB obtained by grimaldiite was explained as catalytic effect (in dark) and photocatalytic contribution (with illumination).

在六亚甲基四胺（HMTA）的存在下，从CrCl ₃水溶液中水热沉淀出Grimaldiite（α-CrOOH ）。Grimaldiite样品的微晶尺寸估计约为2 nm。绿铬矿（α-的Cr ₂ ö ₃）通过grimaldiite的在500和700℃下煅烧制成。FE-SEM图像显示出由于极细的颗粒（微晶）而形成的类似grimitiite的无定形聚集体，而eskolaite则呈球形纳米颗粒的形式。合成的格里木沸石和依考拉石用于罗丹明B（RhB）的降解研究。Grimaldiite获得的RhB的显着降解百分比可解释为催化作用（在黑暗中）和光催化作用（在光照下）。