网页In alkali solution, zinc chloride converts to various zinc hydroxychlorides. These include [Zn (OH)3Cl]2−, [Zn (OH)2Cl2]2−, [Zn (OH)Cl3]2−, and the insoluble Zn5(OH)8Cl2·H2O. The latter is the mineral simonkolleite. [39] When zinc chloride hydrates are heated, HCl gas evolves and hydroxychlorides result.