Lithium tantalate

Lithium tantalate is the inorganic compound with the formula LiTaO3. It is a white, diamagnetic, water-insoluble salt. The compound has the perovskite structure. It has optical, piezoelectric, and pyroelectric properties that make it valuable for nonlinear optics, passive infrared sensors such as motion detectors, terahertz generation and detection, surface acoustic wave applications, cell phones. Considerable information is available from commercial sources about this material.

Lithium tantalate

__ Li+     __ Ta5+     __ O2−
Names
IUPAC name
Lithium tantalate
Other names
Lithium Metatantalate
Identifiers
ECHA InfoCard 100.031.584
RTECS number
  • WW55470000
Properties
LiTaO3
Molar mass 235.887 g/mol
Density 7.46 g/cm3, solid
Melting point 1,650 °C (3,000 °F; 1,920 K)
Insoluble in water
Structure
Space group R3c
a = 515.43 pm, c = 1378.35 pm[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Acute Toxicity: Oral, Inhalation, Dermal
Safety data sheet (SDS) http://www.samaterials.com/pdf/Lithium-Tantalate-Wafers-(LiTaO3-Wafers)-sds.pdf
Related compounds
Other anions
 LiNbO3
Supplementary data page
Lithium tantalate (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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Applications and research

Lithium tantalate is a standard detector element in infrared spectrophotometers.[2]

Pyroelectric fusion has been demonstrated using a lithium tantalate crystal producing a large enough charge to generate and accelerate a beam of deuterium nuclei into a deuterated target resulting in the production of a small flux of helium-3 and neutrons through nuclear fusion without extreme heat or pressure.[3]

A difference between positively and negatively charged parts of pyroelectric LiTaO3 crystals was observed when water freezes to them.[4]

See also
  • Lithium tantalate (data page)

References
  1. Abrahams, S.C; Bernstein, J.L (1967). "Ferroelectric lithium tantalate—1. Single crystal X-ray diffraction study at 24°C". Journal of Physics and Chemistry of Solids. 28 (9): 1685. Bibcode:1967JPCS...28.1685A. doi:10.1016/0022-3697(67)90142-4.
  2. "Application note: Infrared Spectroscopy" (PDF).
  3. B. Naranjo, J.K. Gimzewski & S. Putterman (2005). "Observation of nuclear fusion driven by a pyroelectric crystal". Nature. 434 (7037): 1115–1117. Bibcode:2005Natur.434.1115N. doi:10.1038/nature03575. PMID 15858570. S2CID 4407334.
  4. D. Ehre; E. Lavert; M. Lahav; I. Lubomirsky (2010). "Water Freezes Differently on Positively and Negatively Charged Surfaces of Pyroelectric Materials". Science. 327 (5966): 672–675. Bibcode:2010Sci...327..672E. doi:10.1126/science.1178085. PMID 20133568. S2CID 206522004.


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