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Heritage Science
Fig. 9 | Heritage Science

Fig. 9

From: Rock varnish on architectural stone: microscopy and analysis of nanoscale manganese oxide deposits on the Smithsonian Castle, Washington, DC

Fig. 9

X-ray imaging of Mn-rich zones in cross section. a and b Disposition of nanoscale-Mn-particle decorated surfaces within pores of the Seneca sandstone at moderate magnification. c Net count image of Mn Lα background subtracted and deconvolved from adjacent low energy peaks. d Nanoscale Mn and Fe oxides at higher magnification within a void. Backscattered electron images are inset

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