Lead titanate

Lead titanate
Tetragonal unit cell of lead titanate
Names
Other names
Lead(II) titanate
Lead titanium oxide
Lead(II) titanium oxide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.841 Edit this at Wikidata
EC Number
  • 235-038-9
  • InChI=1S/3O.Pb.Ti/q;2*-1;+2;
    Key: NKZSPGSOXYXWQA-UHFFFAOYSA-N
  • [O-][Ti](=O)[O-].[Pb+2]
Properties
PbTiO3
Molar mass 303.09 g/mol
Appearance Yellow powder
Density 7.52 g/cm3
Insoluble
Hazards
GHS labelling:
GHS07: Exclamation mark GHS08: Health hazard GHS09: Environmental hazard[1]
Danger[1]
H302, H332, H360, H373, H410[1]
P201, P261, P273, P304+P340, P308+P313, P312, P391[1]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Lethal dose or concentration (LD, LC):
12000 mg/kg (rat)
Safety data sheet (SDS) MSDS
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).
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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.

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[ZrxT1−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[clarify].

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. ^ a b c d 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. 51 (22). American Physical Society (APS): 16388–16391. Bibcode:1995PhRvB..5116388N. 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. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-19. Retrieved 2010-09-12.{{cite web}}: CS1 maint: archived copy as title (link)
  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.[1]

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