´
J. Madarasz
116
complex thiosulfates of the type Na4[MII(NH3)4][MI(S2O3)2]2ꢀL
(MII = Cu, Ni; MI = Cu, Ag; L = H2O, NH3). Ann Soc Sci Brux.
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(not matching with appropriate references). Nevertheless,
they slowly begin to decompose above 700 °C with release
of SO2 again. Formation of sodium sulphate seems to start
already in the initial decomposition stages of the title com-
pound, anyhow its presence is proven by occurrence of
endothermic phase transition at 571 °C. This latter com-
pound is water-soluble and easily separable from copper
sulphides by dissolution in water.
11. NIST Chemistry Webbook Standard Reference Database No 69,
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thermal degradation of thiourea by coupled TG-FTIR and TG/
DTA-MS instruments. J Therm Anal Calorim. 2007;88:329–36.
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zentrum Karlsruhe (FIZ) and National Institute of Standards and
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Acknowledgements The purchase of our new HT-XRD apparatus
has been supported by the EU (GVOP-3.2.1.-2004-04-0224, KMA)
and Hungarian Government, what is gratefully thanked. The authors
thank also Oana Carp (Roumanian Academy, Institute of Physical
Chemistry Ilie Murgulescu) for bringing the Cu(II) - thiosulfate sys-
tem [25] into the focus of attention.
´
15. Bombicz P, Madarasz J, Forizs E, Foch I. Structure and thermal
behaviour of (SPY-5-12)-(2-aminoethanol-N)-(2-aminoethanol-
N,O)bis(theophyllinato)copper(II) dihydrate, a model for DNA-
metal interactions. Polyhedron. 1997;16:3601–7.
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16. Madarasz J, Okuya M, Kaneko S. Preparation of covellite and
digenite thin films by an intermittent spray pyrolysis deposition
method. J Eur Cer Soc. 2001;21:2113–6.
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