The invention relates to methods for producing cesium hydroxide solutions
during which: cesium-containing ore is disintegrated with sulfuric acid
while forming a cesium aluminum sulfate hydrate, which is poorly soluble
at low temperatures; the formed cesium alum is separated away in the form
of a solution from the solid ore residues; the aluminum is precipitated
out of the cesium alum solution while forming a cesium sulfate solution;
the formed cesium sulfate solution is reacted with barium hydroxide or
stontium hydroxide while forming a cesium hydroxide solution, and; the
formed cesium hydroxide solution is concentrated and purified.