Figure 7
Luminescence spectra of the rubidium salt (triangles, maximum 539 nm, aqueous solution), the rubidium salt (filled circles, maximum 568 nm, solid state), the potassium salt (solid line, maximum 580 nm, solid state), the ammonium salt (stars, maximum 600 nm, solid state) and the sodium salt (open circles, maximum 645 nm, solid state). |