Collect. Czech. Chem. Commun. 1990, 55, 1691-1707

Comparison of copper sulphate pentahydrate growth rates determined by different methods

Miloslav Karela, Jiří Hostomskýa, Jaroslav Nývlta and Axel Königb

a Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6-Dejvice
b Pedagogic Institute Erfurt/Mühlhausen, 5010 Erfurt, G.D.R.


Crystal growth rates of copper sulphate pentahydrate (CuSO4.5 H2O) determined by different authors and methods are compared. The methods included in this comparison are: (i) Measurement on a fixed crystal suspended in a streaming solution, (ii) measurement on a rotating disc, (iii) measurement in a fluidized bed, (iv) measurement in an agitated suspension. The comparison involves critical estimation of the supersaturation used in measurements, of shape factors used for data treatment and a correction for the effect of temperature. Conclusions are drawn for the choice of values to be specified when data of crystal growth rate measurements are published.