Lead titanate

Lead(II) titanate is an inorganic compound with the chemical formula PbTiO3. It is the lead salt of titanic acid. Lead(II) titanate is a yellow powder that is insoluble in water.

Lead titanate
Names
Other names
Lead(II) titanate
Lead titanium oxide
Lead(II) titanium oxide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.841
EC Number
  • 235-038-9
Properties
PbTiO3
Molar mass 303.09 g/mol
Appearance Yellow powder
Density 7.52 g/cm3
Insoluble
Hazards
Safety data sheet MSDS
GHS pictograms [1]
GHS Signal word Danger[1]
H302, H332, H360, H373, H410[1]
P201, P261, P273, P304+340, P312, P308+313, P391[1]
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
2
0
Lethal dose or concentration (LD, LC):
12000 mg/kg (rat)
Related compounds
Other anions
 Lead dioxide
Lead acetate
Other cations
 Caesium titanate
Iron(II) titanate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

At high temperatures, lead titanate adopts a cubic perovskite structure. At 760 K,[2] the material undergoes a second order phase transition to a tetragonal perovskite structure which exhibits ferroelectricity. Lead titanate is one of the end members of the lead zirconate titanate (Pb[ZrxTi1-x]O3 0≤x≤1, PZT) system, which is technologically one of the most important ferroelectric and piezoelectric ceramics; PbTiO3 has a high ratio of k33 to kp with a high kt.

Lead titanate occurs in nature as mineral macedonite.[3][4]

Toxicity

Lead titanate is toxic, like other lead compounds. It irritates skin, mucous membranes and eyes. It may also cause harm to unborn babies and might have effects on fertility.[5]

Solubility in water

The solubility of hydrothermally-synthesized perovskite-phase PbTiO3 in water was experimentally determined at 25 and 80 °C to depend on pH and vary from 4.9x10−4 mol/kg at pH≈3, to 1.9x10−4 mol/kg at pH≈7.7, to "undetectable" (<3.2x10−7 mol/kg) in the range 10<pH<11. At still higher pH values, the solubility increased again. The solubility was apparently incongruent and was quantified as the analytical concentration of Pb.[6]

References
  1. Sigma-Aldrich Co., Lead(II) titanate. Retrieved on 2019-01-15.
  2. Noheda, Beatriz; Cereceda, Noé; Iglesias, Tomás; Lifante, Ginés; Gonzalo, Julio A.; Chen, Hui Ting; Wang, Yong Ling (1995-06-01). "Composition dependence of the ferroelectric-paraelectric transition in the mixed system PbZr1−xTixO3" (PDF). Physical Review B. American Physical Society (APS). 51 (22): 16388–16391. doi:10.1103/physrevb.51.16388. ISSN 0163-1829. PMID 9978623.
  3. Radusinović, Dušan and Markov, Cvetko "Macedonite - lead titanate: a new mineral", American Mineralogist 56, 387-394 (1971), http://www.minsocam.org/ammin/AM56/AM56_387.pdf
  4. Burke, E.A.J. and Kieft, C. "Second occurrence of makedonite, PbTiO3, Långban, Sweden", Lithos 4, 101-104 (1971)
  5. http://www.alfa.com/content/msds/USA/35671.pdf
  6. Jooho Moon, Melanie L. Carasso, Henrik G. Krarup, Jeffrey A. Kerchner, "Particle-shape control and formation mechanisms of hydrothermally derived lead titanate", Journal of Materials Research, Vol. 14, No.3, March 1999.
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