Rubidium halide

A more detailed discussion of the change in intcrionic distance accompanying this transition for the cesium and rubidium halides has been published Pauling, loc. cit. (20). 

The sodium chloride structure is adopted by most of the alkali metal halides All of the lithium, sodium, potassium, and rubidium halides plus cesium fluoride It is also found in the oxides of magnesium, calcium, strontium, barium, and cadmium... 

Each rubidium halide (Group VIIA element) crystallizing in the NaCl-type lattice has a unit cell length 30 pm greater than that for the corresponding potassium salt of the same halogen. What is the ionic radius of Rb+ computed from these data ... 

As the coordination number of an ion is thus increased from 6 to 8, it appears that the ionic radius also suffers a slight increase, presumably because the repulsion forces, exerted by the electron clouds of neighboring ions, increase. For the rubidium halides and the ammonium halides which can assume either structure (depending upon pressure and temperature), the interionic distances in the structures having coordination number 8 are about 3 percent greater than the distances in structures with coordination number 6. This increase is close to the value that would be... 

At higher pressures also the corresponding rubidium halides attain the CsCl lattice which corresponds to a lower molar volume. At 4450 CsCl goes over into a modification with the NaCl lattice. 

Experimental values lithium halides from ref. 18(1979) sodium, potassium and rubidium halides from ref. 11 (1974) cesium halides from ref. 8 (1973). unresolved, only one peak observed, resolved into two, but not three components. 

We had previously used this technique for studying several alkali halides, including Nal, (23) the cesium halides (2A) and the rubidium halides. (25) The apparatus consisted of a one-meter normal incidence monochromator and a magnetic mass spectrometer. In these earlier studies, ionic species attributable to dimer and monomer were studied, but the intensity of trimer was too weak for measurement. With our more recent interest in trimer, we once again turned to the lithium halides. This time, our apparatus consisted of a three-meter normal incidence monochromator and a quadrupole mass spectrometer. (7 )... 

No binary solid phases are observed in the B203—Mo03 system.197 I.r. spectra of B02 in potassium and rubidium halide lattices have been observed, and the data so obtained used to determine the anharmonic force-field of B02.198... 

Fig. 6. The stability of complexes of rubidium halides with trialkyl alanes (166, 317).

Most of the published work on R-doped rubidium halides was done by Sastry and coworkers. It was summed up (together with work on other alkali halides) by Sastry (1993). The summary gives TL characteristics, models and mechanisms. A Table (pp. 135-138)... 

There is some evidence from Mossbauer spectroscopy for the existence of charge states of krypton following electron capture by Rb in rubidium halides,although the n asured isomer shift is very small. 

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