Mass spectrometric studies on the sublimation of rubidium perrhenate

Thermodynamic Properties of the RbReO4 — CsReO4 System

“…The following main ions were found in the mass spectra of vapours over the RbRe04-CsRe04 solid system: Rb ", Cs ", CsO+, RbRe04+, CsRe04+, Rb2Re04+ , Cs 2ReO,t and RbCsReO,t. On the basis of the existence of the RbCsRe04+ ion and the results of investigations of vaporization of RbRe04 [8] and CsRe04 [9] it should be concluded that vapors over RbRe04 -CsRe04 system contain monomers RbRe04 and CsRe04, simple dimers (RbRe04h and (CsRe04)2 and mixed dimer RbCs(Re04h. Since the monomeric RbReO: and CsReO,t ions may be formed not only by ionization, of monomers but also as the product of dimer fragmentation, only the intensities of Rb 2ReO:, Cs 2Re04+ and RbCsReO: ions may be applied for the determination of the excess Gibbs free energy.…”

“…There are investigations in number about thermodynamic properties [1,2], structure [3], mass diffusion [4,5], and electronic properties [6,7] of the hydrides of the Vb transition group metals. To gain insight into the electronic properties of these systems NMR measurements may be an appropriate tool [8].…”

Technology to Produce High-Purity Anhydrous Rubidium Perrhenate on an Industrial Scale

“…In particular, there is no information on the industrial scale production of this compound. Its synthesis has so far been devoted to obtaining materials for physico-chemical property determination [1,2,3]. Preparation is generally based on the neutralization of perrhenic acid solution by rubidium carbonate or hydroxide in equimolar amounts, resulting in the precipitation of rubidium perrhenate [4,5].…”