Rubidium Chlor-platinate, Rb2PtCl6, yields microscopic octahedral crystals, yellow in colour, and having the following solubilities in water at various temperatures:
| Temperature0 ะก | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | | Grams Rb2PtCl6) in 100 grams H2O | 0.184 | 0.154 | 0.141 | 0.145 | 0.166 | 0.203 | 0.253 | 0.329 | 0.417 | 0.521 | 0.634 | |