Zinc molybdate
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| Identifiers | |
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| ECHA InfoCard | 100.033.965 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| ZnMoO4 | |
| Molar mass | 225.33 g/mol |
| Appearance | white tetragonal crystals |
| Density | 4.32 g/cm3[2] |
| Melting point | 900 °C (1,650 °F; 1,170 K) |
| insoluble | |
| Structure | |
| tetragonal | |
| Hazards | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zinc molybdate is an inorganic compound with the formula ZnMoO4. It is used as a white pigment, which that is also a corrosion inhibitor. A related pigment is sodium zinc molybdate, Na2Zn(MoO4)2.[3] The material has also been investigated as an electrode material.[4]
In terms of its structure, the Mo(VI) centers are tetrahedral and the Zn(II) centers are octahedral.[2]
Safety
The LD50 (oral, rats) is 11,500 mg/kg.[3] While highly soluble molybdates like e.g. sodium molybdate are toxic in higher doses, zinc molybdate is essentially non-toxic because of its insolubility in water. Molybdates possess a lower toxicity than chromates or lead salts and are therefore seen as an alternative to these salts for corrosion inhibition.
References
- ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–95, ISBN 978-0-8493-0594-8
- ^ a b Ait Ahsaine, H.; Zbair, M.; Ezahri, M.; Benlhachemi, A.; Arab, M.; Bakiz, B.; Guinneton, F.; Gavarri, J. R. (2015). "Rietveld Refinements, Impedance Spectroscopy and Phase Transition of the Polycrystalline ZnMoO4 Ceramics". Ceramics International. 41 (10): 15193–15201. doi:10.1016/j.ceramint.2015.08.094.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ a b G. Etzrodt (2012). "Pigments, Inorganic 5. Anticorrosive Pigments". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.n20_n04. ISBN 978-3527306732.
- ^ Hu, Xianluo; Zhang, Wei; Liu, Xiaoxiao; Mei, Yueni; Huang, Yunhui (2015). "Nanostructured Mo-based electrode materials for electrochemical Energy Storage". Chemical Society Reviews. 44 (8): 2376–404. doi:10.1039/C4CS00350K. PMID 25688809. S2CID 205906132.
External links
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