Fig. 4From: The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticlesa, b TEM images depicting the agglomeration of minium nanoparticles to linear or curvilinear features (labelled with arrows); c high resolution TEM images of minium nanoparticles in a silica matrix; lattice fringes parallel to (311) and (420) are highlighted with white linesBack to article page