Studies on partially oxidised one-dimensional bis(oxalato)platinate salts containing divalent cations

• Published in: The Journal of physics and chemistry of solids 1982, Vol.43 (3), p.183-187
• Main Authors: Watkins, David M., Underbill, Allan E., Jacobsen, Claus S.
• Format: Article
• Language: English
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/0022-3697(82)90177-9

The preparation and electrical conduction properties of the isostructural one-dimensional conductors Ni 0.84[Pt(C 2O 4) 2]·6H 2O(Ni-OP) and Mn 0.81[Pt(C 2O 4) 2]·6H 2O(Mn-OP) are described. Ni-OP exhibits a similar tem dependence of conductivity to the isostructural compounds Co 0.83[Pt(C 2O 4) 2]·6H 2O(Co-OP) and Zn 0.81[Pt(C 2O 4) 2]·6H 2O whereas the behaviour of Mn-OP is rather like that of K 2[Pt(CN) 4]Br 0.3·3H 2O. These differences are discussed in terms of the variation from compound to compound of the critical temperature for the formation of the “non-Peierls” superstructure ( T c ) and the temperature at which the CDW/PD on adjacent conducting chains undergo three-dimensional ordering ( T 3 D ). The variation of thermopower with temperature for Co-OP and Mg 0.82[Pt(C 2O 4) 2]·6H 2O is reported and related to the conduction properties and phase changes which have been observed for these compounds. For the isostructural series M 0.8[Pt(C 2O 4) 2]·6H 2O (M = Mg, Mn, Co, Ni or Zn) the variation of ( T 3 D ) from compound to compound is related to differences in the polarizing power of the cations.