%0 Journal Article %T Structural role of Cu in the soil active glasses %A Justyna Su£żowska %A Irena Wac£żawska %J Processing and Application of Ceramics %D 2012 %I University of Novi Sad %X Glasses from the SiO2-P2O5-K2O-CaO-MgO-CuO system acting as slow release fertilizers were synthesized by the melt-quenching technique. Influence of copper addition on structure of the glasses was evaluated by XRD, SEM, FT-IR and Raman spectroscopy. Chemical activity of the glasses in 2 wt.% citric acid solutions was measured by ICP-AES method. It has been found that increasing content of phosphorous increased solubility of copper in the structure of the studied glasses which was the result of formation of P-O-Cu bonds. %K Glassy fertilizers %K Structural characterization %K FT-IR %K Raman spectroscopy %K XRD %U http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2016%2002.pdf