Fig. 2. Powder X-ray diffraction patterns of synthetic potassium zinc hexacyanoferrate(II) nonahydrate, K2Zn3[Fe(CN)6]2 x 9H2O, where CN is cyanide, and three blast furnace sludge samples from different locations. Note that the intensity scaling factor is 0.66 for the synthetic potassium zinc hexacyanoferrate(II) nonahydrate whereas it is 4 for Samples 2076 and 2128 and 10 for Sample 2153. Relevant peaks are marked with corresponding d spacings in nm. Cyanide contents are 9280 mg kg-1 CN for Sample 2076; 3230 mg kg-1 CN for Sample 2128; and 6760 mg kg-1 CN for Sample 2153.
