Synthesis and structural study of stoichiometric BiTi2O7 pyrochlore
Synthesis and structural study of stoichiometric BiTi2O7 pyrochlore
Bi2Ti2O7 has been synthesized using a co-precipitation route from H2O2/NH3(aq) solutions of titanium with aqueous bismuth nitrate. The stoichiometric material crystallizes into a pale yellow cubic pyrochlore phase. A powder X-ray diffraction study showed this crystallization to be very temperature sensitive, the pure phase can only be obtained within a few degrees of 470degreesC. Time-of-flight powder neutron diffraction studies of Bi2Ti2O7 (Space group Fd (3) over barm, a = 10.37949(4) Angstrom at ambient temperature, Z = 8, R-p = 3.95%, R-wp = 4.75%) revealed positional disorder in the bismuth site and in the O' oxide site both at ambient temperature and at 2K.
bismuth titanate, pyrochlore, neutron diffraction, disorder chemical solution decomposition, bond-valence parameters, bi2ti2o7thin-films, mechanochemical activation, neutron-diffraction, cubicpyrochlore, ceramics, titanate, bi2sn2o7, systems
139-145
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Wiggin, Seth B.
e5668817-d0f1-42e8-8d35-c864722e9eb0
1 January 2004
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Wiggin, Seth B.
e5668817-d0f1-42e8-8d35-c864722e9eb0
Hector, Andrew L. and Wiggin, Seth B.
(2004)
Synthesis and structural study of stoichiometric BiTi2O7 pyrochlore.
Journal of Solid State Chemistry, 177 (1), .
(doi:10.1016/S0022-4596(03)00378-5).
Abstract
Bi2Ti2O7 has been synthesized using a co-precipitation route from H2O2/NH3(aq) solutions of titanium with aqueous bismuth nitrate. The stoichiometric material crystallizes into a pale yellow cubic pyrochlore phase. A powder X-ray diffraction study showed this crystallization to be very temperature sensitive, the pure phase can only be obtained within a few degrees of 470degreesC. Time-of-flight powder neutron diffraction studies of Bi2Ti2O7 (Space group Fd (3) over barm, a = 10.37949(4) Angstrom at ambient temperature, Z = 8, R-p = 3.95%, R-wp = 4.75%) revealed positional disorder in the bismuth site and in the O' oxide site both at ambient temperature and at 2K.
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Published date: 1 January 2004
Keywords:
bismuth titanate, pyrochlore, neutron diffraction, disorder chemical solution decomposition, bond-valence parameters, bi2ti2o7thin-films, mechanochemical activation, neutron-diffraction, cubicpyrochlore, ceramics, titanate, bi2sn2o7, systems
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Local EPrints ID: 20223
URI: http://eprints.soton.ac.uk/id/eprint/20223
ISSN: 0022-4596
PURE UUID: a5624a1e-820c-44d8-8621-18f009b2756d
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Date deposited: 21 Feb 2006
Last modified: 16 Mar 2024 02:53
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Author:
Seth B. Wiggin
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