Tetrahydroxozincate
In chemistry, tetrahydroxozincate or tetrahydroxidozincate is a divalent anion with formula, with a central zinc atom in the +2 or valence state coordinated to four hydroxide groups. It has Sp3 hybridization. It is the most common of the zincate anions, and is often called just zincate.
These names are also used for the salts containing that anion, such as sodium zincate Na2Zn4 and calcium zincate CaZn4·2H2O
Zincate salts can be obtained by reaction of zinc oxide or zinc hydroxide and a strong base like sodium hydroxide.
It is now generally accepted that the resulting solutions contain the tetrahydroxozincate ion. Earlier Raman studies had been interpreted as indicating the existence of linear ions.