Fig. 8From: Precipitation of manganese oxides on the surface of construction materials in the Khmer temples, Cambodia Photographs of the laterite sample from the inner wall of Prasat Chrap (sample no. 3615) covered with manganese oxide precipitates after the experiment of immersion into the oxalic acid solution of a concentration of 0.1 mol/l for 0, 1, 3 and 5 h, respectivelyBack to article page