... coprecipitation of Au and amorphous silica and subsequent recrystallization to test whether this is a viable mechanism to generate Au nuggets within quartz veins. Within minutes, coprecipitation of amorphous silica and Au nanoparticles occurred, representing an effective Au deposition mechanism. Within one week...

...Xu Ma; Zidan Yuan; Mario A. Gomez; Xin Wang; Shaofeng Wang; Shuhua Yao; Yongfeng Jia Abstract Arsenic (As), barium (Ba), and sulfate (SO 4 2– ), coexisting in natural and mining impacted environments, possibly lead to As-barite coprecipitation. This work investigated the coprecipitation of Ba 2...

... ≈ 0.15 in the structure of these goethites. Why the cell parameters did not vary as observed for Al-goethites prepared by conventional coprecipitation methods remains unclear, however. The loss of mass occurring at ~750°C, which is associated with the decomposition of sulfate ( Leetma et al ., 2014...

...) and chemically homologous Eu(III) coprecipitated with Mg(OH) 2 as a precursor. X-ray diffraction, Fourier transform infrared spectroscopy and atomic force microscopy identified the reaction products unambiguously as hectorite. The sorption mechanisms of Eu associated with the synthesized hectorite were...

...) coprecipitation of sphalerite and chalcopyrite is an alternative mechanism of formation of the chalcopyrite inclusions in the ore deposits studied. GeoRef, Copyright 2006, American Geological Institute. Abstract, Copyright, Society of Economic Geologists 1991 ...

.... A detailed examination shows that the small platelet-shaped crystals of magnetite occur only inside or along the amphibole lamellae. The phases are inferred to have coprecipitated, governed by the diffusion of H into the sample (diopside 1 + H 2 → diopside 2 + amphibole + magnetite). Such a reaction implies...