Lead carbonate: Difference between revisions

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 441026333

| ImageFile1 = EntryWithCollCode6178.png

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| ImageFile2 = Uhličitan olovnatý.PNG

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| IUPACName = Lead(II) carbonate

|Section1={{Chembox Identifiers

| CASNo = 598-63-0

| CASNo_Ref = {{cascite|correct|CAS}}

| ChemSpiderID = 11234

| EC_number = 209-943-4

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 43M0P24L2B

| PubChem = 11727

| RTECS = OF9275000

|Section2={{Chembox Properties

| Formula = {{chem2|PbCO3}}

| MolarMass = 267.21 g/mol

| Appearance = White powder

| Density = 6.582 g/cm³

| MeltingPtC = 315

| MeltingPt_notes = (decomposes)

| Solubility = 0.00011 g/(100 mL) (20 °C)

| SolubilityProduct = 1.46·10⁻¹³

| SolubleOther = insoluble in [[ethanol|alcohol]], [[ammonia]]; <br> soluble in [[acid]], [[alkali]]

| RefractIndex = 1.804<ref>Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, {{ISBN|0-07-049439-8}}</ref>

| MagSus = −61.2·10⁻⁶ cm³/mol

|Section7={{Chembox Hazards

| ExternalSDS = [http://ptcl.chem.ox.ac.uk/MSDS/LE/lead_carbonate.html External MSDS]

| GHSPictograms = {{GHS07}}{{GHS08}}{{GHS09}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|302|332|360|373|410}}

| PPhrases = {{P-phrases|201|202|260|261|264|270|271|273|281|301+312|304+312|304+340|308+313|312|314|330|391|405|501}}

| FlashPt = Non-flammable

'''Lead(II) carbonate''' is the chemical compound with the chemical formula {{chem2|PbCO3}}. It is a white, toxic solid.<ref name=Ullmann/> It occurs naturally as the mineral [[cerussite]].<ref>''Inorganic Chemistry'', Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 {{ISBN|0-12-352651-5}}</ref>

==Structure==

Like all metal carbonates, lead(II) carbonate adopts a dense, highly crosslinked structure consisting of intact {{chem2|CO3(2-)}} 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.<ref>{{cite journal|doi=10.1524/zkri.1974.139.3-5.215|title=Verfeinerung der Kristallstruktur von Cerussit, PbCO3|journal=Zeitschrift für Kristallographie|volume=139|issue=3–5|pages=215–222|year=1974|last1=Sahl|first1=Kurt|bibcode=1974ZK....139..215S}}</ref>

[[File:EntryWithCollCode6178Hepta.png|thumb|left|Pb site in {{chem2|PbCO3}}, highlighting seven-coordination and the presence of one [[bidentate ligand|bidentate]] carbonate ligand for each Pb center.]]

==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.<ref name=Ullmann>{{Ullmann|first=Dodd S.|last=Carr|year=2005|title=Lead Compounds|doi=10.1002/14356007.a15_249}}</ref>

:{{chem2 | 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.<ref name=Ullmann/>

The supply and use of this compound is restricted in Europe.<ref>{{Cite web | url=http://eur-lex.europa.eu/en/index.htm |title = EU law - EUR-Lex}}</ref>

==Other lead carbonates==

A number of lead carbonates are known:

* [[White lead]], a basic lead carbonate, {{chem2|2PbCO3*Pb(OH)2}}

* [[Shannonite]], {{chem2|PbCO3*PbO}}

* [[Plumbonacrite]], {{chem2|3PbCO3*Pb(OH)2*PbO}}<ref>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. {{cite web |url=http://www.nd.edu/~pburns/pcb075.pdf |title=Archived copy |accessdate=2009-05-21 |url-status=dead |archiveurl=https://web.archive.org/web/20090521065308/http://www.nd.edu/~pburns/pcb075.pdf |archivedate=2009-05-21 }}</ref>

* {{chem2|PbCO3*2PbO}}

* [[Abellaite]], {{chem2|NaPb2(OH)(CO3)2}}

* [[Leadhillite]], {{chem2|2PbCO3*PbSO4*Pb(OH)2}}

{{Carbonates}}

[[Category:Lead(II) compounds]]