Lead silicate

Crystal structure
No drawing available
General
Surname	Lead silicate
other names	Lead metasilicate Lead monosilicate Lead (II) metasilicate
Ratio formula	PbSiO 3
Brief description	white solid
External identifiers / databases
CAS number 10099-76-0 EC number 233-246-4 ECHA InfoCard 100.030.211 PubChem 61535 Wikidata Q18212107
properties
Molar mass	283.28 g mol −1
Physical state	firmly
density	6.49 g cm −3
Melting point	766 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 360Df-332-302-373-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Lead silicate is an inorganic chemical compound of lead from the group of silicates . In addition to lead silicate, there are other silicates such as lead orthosilicate , Pb ₂ SiO ₄ .

Occurrence

Lead silicate occurs naturally in the form of the mineral alamosite .

Extraction and presentation

Lead silicate can be obtained by reacting silicon dioxide with lead (II) oxide or lead (II) sulfate .

${\displaystyle \mathrm {PbO+SiO_{2}\longrightarrow PbSiO_{3}} }$

${\displaystyle \mathrm {2\ PbSO_{4}+2\ SiO_{2}\longrightarrow 2\ PbSiO_{3}+2\ SO_{2}+O_{2}} }$

properties

Lead silicate is a white solid that is insoluble in water. One stable and two metastable modifications of the compound are known. The stable modification has a monoclinic crystal structure with the space group P 2 / n (space group no. 13, position 2) and the lattice parameters a = 1123 pm , b = 708 pm, c = 1226 pm and β = 113 ° 15 'as well as twelve Formula units per unit cell .

use

Lead silicate has been used in paints and as a heat stabilizer.

Individual evidence

1. ↑ ^{a b c d} Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 978-1-4398-1462-8 , pp. 485 ( limited preview in Google Book search).
2. ↑ ^{a b} Entry on lead silicate in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
3. ^ ^{A b c} Richard J. Lewis, Sr .: Hazardous Chemicals Desk Reference . John Wiley & Sons, 2008, ISBN 0-470-33445-2 , pp. 832 ( limited preview in Google Book search).
4. ^ Bernard Moody: Comparative Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4832-8008-0 , pp. 331 ( limited preview in Google Book search).
5. ^ Helmut Schrätze, Karl Ludwig Weiner: Mineralogie: A textbook on a systematic basis . Walter de Gruyter, 1981, ISBN 978-3-11-006823-8 , pp. 206 ( limited preview in Google Book search).
6. ↑ ML Boucher, Donald R. Peacor: The crystal structure of alamosite, PbSiO ₃ . In: Journal of Crystallography . 126, 1968, pp. 98-111, doi : 10.1524 / zkri.1968.126.1-3.98 .