La(Li1/3Ti2/3)O3: A new 1:2 ordered perovskite

Albina Y. Borisevich; Peter K. Davies

doi:10.1016/S0022-4596(02)00064-6

La(Li_1/3Ti_2/3)O₃: A new 1:2 ordered perovskite

Albina Y. Borisevich
, Peter K. Davies

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

A new 1:2 ordered perovskite La(Li_1/3Ti_2/3)O₃ has been synthesized via solid-state techniques. At temperature >1185°C, Li and Ti are randomly distributed on the B-sites and the X-ray powder patterns can be indexed in a tilted (b^-b^-c⁺) Pbnm orthorhombic cell (a=a_c√2=5.545Å, b=a_c√2=5.561Å, c=2a_c=7.835Å). However, for T≤1175°C, a 1:2 layered ordering of Li and Ti along 〈111〉_c yields a structure with a P2₁/c monoclinic cell with a=a_c√6=9.604Å, b=a_c√2=5.552Å, c=a_c3√2=16.661Å, β=125.12°. While this type of order is well known in the A²⁺(B²⁺_1/3B⁵⁺_2/3)O ₃ family of niobates and tantalates, La(Li_1/3Ti_2/3)O₃ is the first example of a titanate perovskite with a 1:2 ordering of cations on the B-sites.

Original language	English
Pages (from-to)	198-201
Number of pages	4
Journal	Journal of Solid State Chemistry
Volume	170
Issue number	1
DOIs	https://doi.org/10.1016/S0022-4596(02)00064-6
State	Published - Jan 2003
Externally published	Yes

Funding

This work was supported by grants from Ericsson Radio Access, and the Ceramics Program at the National Science Foundation (grant DMR98-09035). The work also made use of the MRSEC shared experimental facilities supported by the National Science Foundation through grant DMR 00-79909.

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title = "La(Li1/3Ti2/3)O3: A new 1:2 ordered perovskite",

abstract = "A new 1:2 ordered perovskite La(Li1/3Ti2/3)O3 has been synthesized via solid-state techniques. At temperature >1185°C, Li and Ti are randomly distributed on the B-sites and the X-ray powder patterns can be indexed in a tilted (b-b-c+) Pbnm orthorhombic cell (a=ac√2=5.545{\AA}, b=ac√2=5.561{\AA}, c=2ac=7.835{\AA}). However, for T≤1175°C, a 1:2 layered ordering of Li and Ti along 〈111〉c yields a structure with a P21/c monoclinic cell with a=ac√6=9.604{\AA}, b=ac√2=5.552{\AA}, c=ac3√2=16.661{\AA}, β=125.12°. While this type of order is well known in the A2+(B2+1/3B5+2/3)O 3 family of niobates and tantalates, La(Li1/3Ti2/3)O3 is the first example of a titanate perovskite with a 1:2 ordering of cations on the B-sites.",

author = "Borisevich, \{Albina Y.\} and Davies, \{Peter K.\}",

year = "2003",

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doi = "10.1016/S0022-4596(02)00064-6",

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journal = "Journal of Solid State Chemistry",

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T1 - La(Li1/3Ti2/3)O3

T2 - A new 1:2 ordered perovskite

AU - Borisevich, Albina Y.

AU - Davies, Peter K.

PY - 2003/1

Y1 - 2003/1

N2 - A new 1:2 ordered perovskite La(Li1/3Ti2/3)O3 has been synthesized via solid-state techniques. At temperature >1185°C, Li and Ti are randomly distributed on the B-sites and the X-ray powder patterns can be indexed in a tilted (b-b-c+) Pbnm orthorhombic cell (a=ac√2=5.545Å, b=ac√2=5.561Å, c=2ac=7.835Å). However, for T≤1175°C, a 1:2 layered ordering of Li and Ti along 〈111〉c yields a structure with a P21/c monoclinic cell with a=ac√6=9.604Å, b=ac√2=5.552Å, c=ac3√2=16.661Å, β=125.12°. While this type of order is well known in the A2+(B2+1/3B5+2/3)O 3 family of niobates and tantalates, La(Li1/3Ti2/3)O3 is the first example of a titanate perovskite with a 1:2 ordering of cations on the B-sites.

AB - A new 1:2 ordered perovskite La(Li1/3Ti2/3)O3 has been synthesized via solid-state techniques. At temperature >1185°C, Li and Ti are randomly distributed on the B-sites and the X-ray powder patterns can be indexed in a tilted (b-b-c+) Pbnm orthorhombic cell (a=ac√2=5.545Å, b=ac√2=5.561Å, c=2ac=7.835Å). However, for T≤1175°C, a 1:2 layered ordering of Li and Ti along 〈111〉c yields a structure with a P21/c monoclinic cell with a=ac√6=9.604Å, b=ac√2=5.552Å, c=ac3√2=16.661Å, β=125.12°. While this type of order is well known in the A2+(B2+1/3B5+2/3)O 3 family of niobates and tantalates, La(Li1/3Ti2/3)O3 is the first example of a titanate perovskite with a 1:2 ordering of cations on the B-sites.

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U2 - 10.1016/S0022-4596(02)00064-6

DO - 10.1016/S0022-4596(02)00064-6

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SN - 0022-4596

VL - 170

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EP - 201

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 1

ER -

La(Li_1/3Ti_2/3)O₃: A new 1:2 ordered perovskite

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