The structure of LaTaO4 at 300°C by neutron powder profile analysis

R. J. Cava; R. S. Roth

doi:10.1016/0022-4596(81)90149-3

The structure of LaTaO₄ at 300°C by neutron powder profile analysis

R. J. Cava, R. S. Roth

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Abstract

LaTaO₄ above 175°C is orthorhombic, space group A2₁am, with a = 5.6643(1), b = 14.6411(3), c = 3.9457(1), and Z = 4. It is isostructural with room temperature BaMnF₄. The structure, refined by the Rietveld powder profile analysis technique to a final agreement index of 8.6%, consists of sheets of corner shared TaO₆ octahedra extending perpendicular to b, bonded to each other parallel to b by the nine coordinated lanthanum ions. All atoms are in position (x, y, 0) with coordinates: La (0.1788, 0.1676), Ta (0.2192, 0.4141, O1 (0.4216, 0.3008), O2 (-0.0486, 0.3380), O3 (0.5614, 0.4689), O4 (0.2496, 0.9153). Orthorhombic CeTaO₄ and PrTaO₄ are isostructual.

Original language	English (US)
Pages (from-to)	139-147
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	36
Issue number	2
DOIs	https://doi.org/10.1016/0022-4596(81)90149-3
State	Published - Feb 1981
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{23be15f5c9804c26855b3a92146daf05,

title = "The structure of LaTaO4 at 300°C by neutron powder profile analysis",

abstract = "LaTaO4 above 175°C is orthorhombic, space group A21am, with a = 5.6643(1), b = 14.6411(3), c = 3.9457(1), and Z = 4. It is isostructural with room temperature BaMnF4. The structure, refined by the Rietveld powder profile analysis technique to a final agreement index of 8.6%, consists of sheets of corner shared TaO6 octahedra extending perpendicular to b, bonded to each other parallel to b by the nine coordinated lanthanum ions. All atoms are in position (x, y, 0) with coordinates: La (0.1788, 0.1676), Ta (0.2192, 0.4141, O1 (0.4216, 0.3008), O2 (-0.0486, 0.3380), O3 (0.5614, 0.4689), O4 (0.2496, 0.9153). Orthorhombic CeTaO4 and PrTaO4 are isostructual.",

author = "Cava, {R. J.} and Roth, {R. S.}",

year = "1981",

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doi = "10.1016/0022-4596(81)90149-3",

language = "English (US)",

volume = "36",

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journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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T1 - The structure of LaTaO4 at 300°C by neutron powder profile analysis

AU - Cava, R. J.

AU - Roth, R. S.

PY - 1981/2

Y1 - 1981/2

N2 - LaTaO4 above 175°C is orthorhombic, space group A21am, with a = 5.6643(1), b = 14.6411(3), c = 3.9457(1), and Z = 4. It is isostructural with room temperature BaMnF4. The structure, refined by the Rietveld powder profile analysis technique to a final agreement index of 8.6%, consists of sheets of corner shared TaO6 octahedra extending perpendicular to b, bonded to each other parallel to b by the nine coordinated lanthanum ions. All atoms are in position (x, y, 0) with coordinates: La (0.1788, 0.1676), Ta (0.2192, 0.4141, O1 (0.4216, 0.3008), O2 (-0.0486, 0.3380), O3 (0.5614, 0.4689), O4 (0.2496, 0.9153). Orthorhombic CeTaO4 and PrTaO4 are isostructual.

AB - LaTaO4 above 175°C is orthorhombic, space group A21am, with a = 5.6643(1), b = 14.6411(3), c = 3.9457(1), and Z = 4. It is isostructural with room temperature BaMnF4. The structure, refined by the Rietveld powder profile analysis technique to a final agreement index of 8.6%, consists of sheets of corner shared TaO6 octahedra extending perpendicular to b, bonded to each other parallel to b by the nine coordinated lanthanum ions. All atoms are in position (x, y, 0) with coordinates: La (0.1788, 0.1676), Ta (0.2192, 0.4141, O1 (0.4216, 0.3008), O2 (-0.0486, 0.3380), O3 (0.5614, 0.4689), O4 (0.2496, 0.9153). Orthorhombic CeTaO4 and PrTaO4 are isostructual.

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JO - Journal of Solid State Chemistry

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ER -

The structure of LaTaO₄ at 300°C by neutron powder profile analysis

Abstract

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