Sodium zincate

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Sodium zincate
CAS number 12179-14-5 YesY
PubChem 166652
EC number 235-342-1
Jmol-3D images Image 1
Molecular formula Na2Zn(OH)4
Molar mass 179.418 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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.[1]


Solutions of sodium zincate may be prepared by dissolving zinc, zinc hydroxide, or zinc oxide in an aqueous solution of sodium hydroxide.[2] 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.[3]
The salt Sr2Zn(OH)6 features zinc in an octahedral coordination sphere.


Related oxides are also known such as Na2ZnO2,[4] Na2Zn2O3,[5] Na10Zn4O9.[6]


  1. ^ Glenn O. Mallory, Juan B. Hajdu, (1990), Electroless Plating: Fundamentals and Applications, American Electroplaters and Surface Finishers Society, , William Andrew Inc., ISBN 0-936569-07-7
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419. 
  3. ^ Synthese und Kristallstruktur von Na2Zn(OH)4, R. Stahl , R. Niewa , H. Jacobs, Zeitschrift für anorganische und allgemeine Chemie, volume 625, pp. 48 - 50, doi:10.1002/(SICI)1521-3749(199901)625:1<48::AID-ZAAC48>3.0.CO;2-L
  4. ^ Ein neues Natriumzinkat, D. Trinschek, M. Jansen: Na2ZnO2, Z. Naturforschung 51b (1996) 711-4
  5. ^ Eine neue Modifikation von Na2Zn2O3, D. Trinschek, M. Jansen: , Z. Naturforschung 51b, (1996), 917-21
  6. ^ 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