Editing Solution (chemistry) (section)

=== Solid solutions ===
If the solvent is a [[solid]], then gases, liquids, and solids can be dissolved.
* Gas in solids:
** [[Hydrogen]] dissolves rather well in metals, especially in [[palladium]]; this is studied as a means of [[hydrogen storage]].
* Liquid in solid:
** [[Mercury (element)|Mercury]] in [[gold]], forming an [[amalgam (chemistry)|amalgam]]
** Water in solid salt or [[sugar]], forming moist solids
** [[Hexane]] in [[paraffin wax]]
** [[Polymer]]s containing [[plasticizer]]s such as [[Bis(2-ethylhexyl) phthalate|phthalate]] (liquid) in [[Polyvinyl chloride|PVC]] (solid)
* Solid in solid:
** [[Steel]], basically a solution of carbon atoms in a crystalline matrix of iron atoms{{clarify|this is a gross oversimplification of the iron/iron carbide phase diagram|date=August 2021}} 
** [[Alloy]]s like [[bronze]] and many others
** [[Radium]] [[sulfate]] dissolved in [[barium sulfate]]: a true solid solution of Ra in BaSO<sub>4</sub>