Lead titanate
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (October 2016) |
Names | |
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Other names
Lead(II) titanate
Lead titanium oxide Lead(II) titanium oxide | |
Identifiers | |
ECHA InfoCard | 100.031.841 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
PbTiO3 | |
Molar mass | 303.09 g/mol |
Appearance | Yellow powder |
Density | 7.52 g/cm3 |
Insoluble | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Toxic (T) Dangerous for the environment (N) May damage fertility or unborn child |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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12000 mg/kg (rat) |
Related compounds | |
Other anions
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Lead dioxide Lead acetate |
Other cations
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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[Template:ZirconiumTemplate:Titanium]Template:Oxygen 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
- ^ a b Alfa Aesar "Archived copy". Archived from the original on 2011-07-07. Retrieved 2010-09-12.
{{cite web}}
: Unknown parameter|deadurl=
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suggested) (help)CS1 maint: archived copy as title (link) - ^ Noheda, Cereceda, Iglesias, Lifante, Gonzalo, Chen and Wang, Phys. Rev. B 51, 16388 (1995)
- ^ 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
- ^ Burke, E.A.J. and Kieft, C. "Second occurrence of makedonite, PbTiO3, Långban, Sweden", Lithos 4, 101-104 (1971)
- ^ http://www.alfa.com/content/msds/USA/35671.pdf
- ^ 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]