Synthesis of mixed alkali acid sulphates Cs1-xRbxHSO4 (0<x<1)
Written by sctunisie no commentsSome compositions of solid-solution Cs1-xRbxHSO4 in the CsHSO4-RbHSO4 system have been synthesized by two methods :
- Single crystals were grown by slow evaporation at 300K in aqueous solution by mixing in appropriate molar ratios Cs2SO4 and Rb2SO4 in sulfuric acid and adding a little water.
- Cs1-xRbxHSO4 (0.1 < x < 0.9) materials have been synthesized by melting mixing of CsHSO4 and RbHSO4 powders and quenching in liquid nitrogen.
The unit-cell dimensions have been determined by using X-Ray powder patterns, Weissenberg and Precession methods. A comparison between density measurements from pellets mass determination and from unit cell parameters calculation (X-Ray results) allows to comfort the unit-cell parameters determination and the unit-cell parameters derived from a least-squares treatment of powder data. A rough draft of phase diagram of binary CsHSO4-RbHSO4 is presented.
T. Mhiri
Pages 59-71
