sodium zincate
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Sodium zincate refers to anionic zinc oxides or hydroxides, depending on conditions. In the applications of these materials, the exact formula is not necessarily important and it is likely that aqueous zincate solutions consist of mixtures.


Hydroxyzincates

Solutions of sodium
zincate In chemistry the term zincate may refer to several substances containing the element zinc: * usually the anion ZnO22−, more properly called tetrahydroxozincate or salts thereof, such as sodium zincate . * the polymeric anion n(OH)3−and its ...
may be prepared by dissolving
zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...
, zinc hydroxide, or
zinc oxide Zinc oxide is an inorganic compound with the formula . It is a white powder that is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement ...
in an aqueous solution of sodium hydroxide. Simplified equations for these complex processes are: :ZnO + H2O + 2 NaOH → Na2Zn(OH)4 :Zn + 2 H2O + 2 NaOH → Na2Zn(OH)4 + H2 From such solutions, one can crystallize salts of containing the anions Zn(OH)42−, Zn2(OH)62−, and Zn(OH)64−. Na2Zn(OH)4 consists of tetrahedral zincate ion and octahedral sodium cations.
The salt Sr2Zn(OH)6 features zinc in an octahedral coordination sphere.


Oxozincates

Related oxides are also known such as Na2ZnO2,D. Trinschek, M. Jansen (1996): "Na2ZnO2, ein neues Natriumzinkat". ''Zeitschrift für Naturforschung B'', volume 51, issue 5, pages 711-714. Na2Zn2O3, Na10Zn4O9.Ein neues Oxozinkat mit trigonal-planar koordiniertem Zink, D. Trinschek, M. Jansen: Na10Zn4O9, Zeitschrift für anorganische und allgemeine Chemie volume 622 (1996), pp. 245-50


References

Sodium compounds Zinc compounds {{inorganic-compound-stub