Cesium Aluminum Research Articles

A new family of vitreous materials: The cesium aluminum or gallium thiohalide glasses

A new class of non-oxide glasses with the general composition CsAXY 2 (A  Al, Ga; X  S, Se; Y  Cl, Br) has been isolated and characterized. Raman spectroscopy, investigations of the I.R. multiphonon edge, Differential Thermal Analysis measurements show that these glasses contain a giant polymeric tetrahedra-based anion and have a good stability towards devitrification. Their chemical durability in normal atmosphere is very poor and affects severely their optical properties, specially in the I.R. multiphonon region.

Vibrational spectroscopic studies of trivalent hexa-aqua-cations: single-crystal Raman spectra of caesium aluminium alums between 300 and 1 200 cm–1

Oriented single-crystal Raman spectra of CsAl(SO4)2·12H2O, CsAl(SeO4)2·12H2O, and CsAl(SO4)2·12D2O have been recorded at 80 K. A complete assignment of the spectra has been made between 300 and 1 200 cm–1 using factor group analysis. All external modes of co-ordinated water for both [Cs(OH2)6]+ and [Al(OH2)6]3+ have been identified. The wavenumbers of the internal modes of [Al(OH2)6]3+ are ν1= 542 cm–1 and ν2= 473 cm–1, with ν5 centred at 347 cm–1.

Solubility diagram of system: Csalh4-dimethyl ether-diethylene glycol

1. A study was made of the reaction in the system CsAlH4-diglyme in the interval from −65 to 50°. 2. The crystallization region of the unsolvated cesium aluminum hydride was determined, and the existence of a CsAlH4 solvate was established, which melts incongruently at −23°.

Total Nondestructive Analysis of Caas Syenite

AbstractDetermination of 35 trace and 8 major elements in a granitic rock by nondestructive X-ray emission and fast-neutron activation methods has been accomplished. Trace elements arsenic, barium, cadmium, cerium, cobalt, chromium, cesium, copper, gallium, gadolinium, germanium, hafnium, mercury, indium, lanthanum, molybdenum, manganese, niobium, neodymium, nickel, rubidium, antimony, scandium, samarium, tin, strontium, tantalum, thorium, titanium, vanadium, yttrium, ytterbium, zinc, and zirconium and major elements aluminum, calcium, iron, potassium, and silicon have been estimated in the vacuum X-ray spectrograph. Phosphorus has been excited by a chromium-target tube. Major elements magnesium, sodium, and oxygen have been estimated by the Henke aluminumtarget X-ray spectrograph. Major elements oxygen and silicon have also been determined by fast-neutron activation. Detection limits for traces are in cur system in the range of 1 to 100 ppm with standard deviations of about 1 to 10 ppm. Precision in the determination of major constituents is better than 1% in relative standard deviation. The data are reported in parts per million for the trace elements and for the major elements as well. It is suggested that this type of repotting of geochemical data be preferred to the conventional reporting of major constituents as oxides.