Lead(II) carbonate is the chemical compound with the chemical formula PbCO3. It is a white, toxic solid. It occurs naturally as the mineral cerussite.
Structure
Like all metal carbonates, lead(II) carbonate adopts a dense, highly crosslinked structure consisting of intact CO2−3 and metal cation sites. As verified by X-ray crystallography, the Pb(II) centers are seven-coordinate, being surrounded by multiple carbonate ligands. The carbonate centers are bonded bidentate to a single Pb and bridge to five other Pb sites.3
Production and use
Lead carbonate is manufactured by passing carbon dioxide into a cold dilute solution of lead(II) acetate, or by shaking a suspension of a lead salt more soluble than the carbonate with ammonium carbonate at a low temperature to avoid formation of basic lead carbonate.4
Pb(CH3COO)2 + [NH4]2CO3 → PbCO3 + 2 [NH4](CH3COO)Lead carbonate is used as a catalyst to polymerize formaldehyde to poly(oxymethylene). It improves the bonding of chloroprene to wire.5
Regulations
The supply and use of this compound is restricted in Europe.6
Other lead carbonates
A number of lead carbonates are known:
- White lead, a basic lead carbonate, 2PbCO3·Pb(OH)2
- Shannonite, PbCO3·PbO
- Plumbonacrite, 3PbCO3·Pb(OH)2·PbO7
- PbCO3·2PbO
- Abellaite, NaPb2(OH)(CO3)2
- Leadhillite, 2PbCO3·PbSO4·Pb(OH)2
External links
References
Carr, Dodd S. (2005). "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249. ISBN 978-3-527-30673-2. 978-3-527-30673-2 ↩
Inorganic Chemistry, Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5 /wiki/ISBN_(identifier) ↩
Sahl, Kurt (1974). "Verfeinerung der Kristallstruktur von Cerussit, PbCO3". Zeitschrift für Kristallographie. 139 (3–5): 215–222. Bibcode:1974ZK....139..215S. doi:10.1524/zkri.1974.139.3-5.215. /wiki/Bibcode_(identifier) ↩
Carr, Dodd S. (2005). "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249. ISBN 978-3-527-30673-2. 978-3-527-30673-2 ↩
Carr, Dodd S. (2005). "Lead Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a15_249. ISBN 978-3-527-30673-2. 978-3-527-30673-2 ↩
"EU law - EUR-Lex". http://eur-lex.europa.eu/en/index.htm ↩
S.V. Krivovichev and P.C. Burns, "Crystal chemistry of basic lead carbonates. II. Crystal structure of synthetic 'plumbonacrite'." Mineralogical Magazine, 64(6), pp. 1069-1075, December 2000. "Archived copy" (PDF). Archived from the original (PDF) on 2009-05-21. Retrieved 2009-05-21.{{cite web}}: CS1 maint: archived copy as title (link) https://web.archive.org/web/20090521065308/http://www.nd.edu/~pburns/pcb075.pdf ↩