Pyrophosphato-Complexes of Nickel and Cobalt in Solution

THE literature on complex pyrophosphates of nickel and cobalt does not record any detailed study of their solutions. Rosenheim 1 observed that from solutions of alkali pyrophosphates containing nickel and cobalt pyrophosphates, the normal pyrophosphates separate unchanged. Later, Bassett and his co-...

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Bibliographic Details
Published in:Nature (London) 1950-01, Vol.166 (4226), p.744-745
Main Author: HALDAR, B. C.
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Summary:THE literature on complex pyrophosphates of nickel and cobalt does not record any detailed study of their solutions. Rosenheim 1 observed that from solutions of alkali pyrophosphates containing nickel and cobalt pyrophosphates, the normal pyrophosphates separate unchanged. Later, Bassett and his co-workers 2 stated that nickel and cobalt pyrophosphates dissolve in excess of alkali pyrophosphates giving yellowish-green and purple solutions respectively, but they could not isolate any complex salt in the solid phase. This, however, does not show the non-existence of complex ions containing nickel or cobalt and pyrophosphate ion in solution. I have investigated complex formation in solution by different physico-chemical methods such as thermometric, transport, conductometric, p H measurements, cryoscopy in saturated sodium sulphate solutions and magnetic measurements.
ISSN:0028-0836
1476-4687
DOI:10.1038/166744a0