Research output: Contribution to journal › Article › peer-review
X-Ray Diffraction Study of the Decomposition Process Occurring in Single Crystals of the K2NiF4-Type Aluminate LaCaAlO4. / Smirnov, Yr; Zvereva, I.; Choisnet, J.
In: Journal of Solid State Chemistry, Vol. 134, No. 1, 15.11.1997, p. 132-137.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - X-Ray Diffraction Study of the Decomposition Process Occurring in Single Crystals of the K2NiF4-Type Aluminate LaCaAlO4
AU - Smirnov, Yr
AU - Zvereva, I.
AU - Choisnet, J.
N1 - Funding Information: We are grateful to the Russian Fund of Fundamental Research for its financial support (Grant 97-03-33115).
PY - 1997/11/15
Y1 - 1997/11/15
N2 - The results of an X-ray diffraction study of the decomposition process occurring in the K2NiF4-type aluminate LaCaAlO4are reported. The experimental data concern two small single crystals heated for 1 and 10 h at 1200°C, respectively. As a final result, the presence of LaAlO3perovskite and CaO is unambiguously observed. After 1 h of heating, several intermediate phases can be identified as small-size LaAlO3-like microprecipitates. Well-defined orientation phenomena with respect to the matrix LaCaAlO4are evidenced for these phases and for CaO as well. On the basis of the variation of the perovskite cell volume of the intermediate phases, the decomposition process is tentatively modeled. In this respect, a tetragonal phase is considered as the precursor of LaAlO3perovskite.
AB - The results of an X-ray diffraction study of the decomposition process occurring in the K2NiF4-type aluminate LaCaAlO4are reported. The experimental data concern two small single crystals heated for 1 and 10 h at 1200°C, respectively. As a final result, the presence of LaAlO3perovskite and CaO is unambiguously observed. After 1 h of heating, several intermediate phases can be identified as small-size LaAlO3-like microprecipitates. Well-defined orientation phenomena with respect to the matrix LaCaAlO4are evidenced for these phases and for CaO as well. On the basis of the variation of the perovskite cell volume of the intermediate phases, the decomposition process is tentatively modeled. In this respect, a tetragonal phase is considered as the precursor of LaAlO3perovskite.
UR - http://www.scopus.com/inward/record.url?scp=0000969774&partnerID=8YFLogxK
U2 - 10.1006/jssc.1997.7557
DO - 10.1006/jssc.1997.7557
M3 - Article
AN - SCOPUS:0000969774
VL - 134
SP - 132
EP - 137
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 1
ER -
ID: 88614678