Sodium zincate

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Sodium zincate
Names
IUPAC name
sodium tetrahydroxozincate(II)
Identifiers
3D model (
JSmol
)
ECHA InfoCard
 100.032.117 Edit this at Wikidata
EC Number
  • 235-3 ft42-1
  • InChI=1S/2Na.4H2O.Zn/h;;4*1H2;/q2*+1;;;;;+2/p-4
  • [OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Zn+2]
Properties
Na2[Zn(OH)4]
Molar mass 179.418 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.[1]

Hydroxyzincates

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.

Oxozincates

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

References

  1. ISBN 0-936569-07-7
  2. ISBN 978-0-08-037941-8
    .
  3. doi:10.1002/(SICI)1521-3749(199901)625:1<48::AID-ZAAC48>3.0.CO;2-L
  4. doi:10.1515/znb-1996-0515
  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
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