Ions, magnetic susceptibility

A energy for /-electron excitation x single-ion magnetic susceptibility... 

Fig. 45. Magnetic form factor of CeSnjIn at T= 5.5 and 75 K. Solid line is 4f form factor for free Ce ion. Magnetic susceptibility measurement data on the same sample have been added at sin 01X = 0. Numbers indicate Bragg indices (Benoit et al. 1985).

Electrobalances suitable for thermogravimetry are readily adapted for measurements of magnetic susceptibility [333—336] by the Faraday method, with or without variable temperature [337] and data processing facilities [338]. This approach has been particularly valuable in determinations of the changes in oxidation states which occur during the decompositions of iron, cobalt and chromium oxides and hydroxides [339] and during the formation of ferrites [340]. The method requires higher concentrations of ions than those needed in Mossbauer spectroscopy, but the apparatus, techniques and interpretation of observations are often simpler. 

Other possibilities considered were that a CgH I moiety was bonding to the Pu3+ ion, and that the pyrolytic product could be a Pu2+ compound. The former is incompatible with the ir spectra, the latter with the magnetic susceptibility results. No evidence was found for a hydride ion in the ir spectra. The pyrolytic product... 

The multiplicity can be determined from the experimental values of the magnetic susceptibility, the magnetic moment in Bohr magnetons being equal to 2 VS(S + l), in which S is the spin quantum number. (The multiplicity is 2S + 1.) The moments for 22 and 62 are 1.73 and 5.91, respectively. The experimental values for K3Fe(CN)6 and (NH jFeF are 2.0 and 5.88, respectively, so that the bonds in the [FefCN ] ion are electron-pair bonds, and those in [FeFe]a are ionic. 

The electrocrystallization and characterization of a novel molecular metal which displays both electronic and ionic conduction has been reported. The complex Li0.6(15-crown-5-ether)[Ni-(dmit)2] H20 is composed of stacks of [Ni(dmit)2] units which provide pathways for electronic conduction. The stacks are separated by parallel stacks of 15-crown-5-ether moieties in a channellike formation which facilitates ion conduction. The salt has a room temperature conductivity of 240 Scm-1. Temperature-dependent magnetic susceptibility and NMR measurements were used to prove the existence of Li+ movement within the crown ether channels.1030... 

The magnetic susceptibility of the free ion will follow the Curie law ... 

---