TY - JOUR
T1 - Identification and characterisation of a new orthorhombic Ti6Sn5O0.9 structure
AU - Inoue, Sota
AU - Yamane, Hisanori
AU - Yamada, Takahiro
N1 - Funding Information:
The authors are grateful to T. Kamaya for performing the EPMA. This work was supported by a KAKENHI Grant-in-Aid (No. JP19H02794 and JP20H02820 ) from the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9
Y1 - 2021/9
N2 - The orthorhombic phase of Ti6Sn5 in the Ti-Sn binary system is regarded as a low-temperature or metastable phase. The motivation of the present study was to clarify the presence of this orthorhombic phase. This phase could not be synthesized by heating a mixture of Ti and Sn powder at 873 K, whereas single crystals of a novel suboxide, Ti6Sn5O0.88 (orthorhombic, a = 5.72790(10) Å, b = 9.1379(2) Å, c = 16.9275(3) Å, space group Immm), were obtained by heating powders of Ti, Sn, and TiO2 at 1273 K in an Ar atmosphere, followed by slow cooling. Crystal structure analysis of single-crystal X-ray diffraction data indicated that the O atoms are located at a 4 g site in the Ti tetrahedron of the orthorhombic Ti6Sn5 structure. An almost single-phase polycrystalline bulk sample of Ti6Sn5O0.9 was prepared by heating a compacted powder mixture of Ti, Sn, SnO2 at 1173 K. The bulk sample exhibited metallic electrical properties.
AB - The orthorhombic phase of Ti6Sn5 in the Ti-Sn binary system is regarded as a low-temperature or metastable phase. The motivation of the present study was to clarify the presence of this orthorhombic phase. This phase could not be synthesized by heating a mixture of Ti and Sn powder at 873 K, whereas single crystals of a novel suboxide, Ti6Sn5O0.88 (orthorhombic, a = 5.72790(10) Å, b = 9.1379(2) Å, c = 16.9275(3) Å, space group Immm), were obtained by heating powders of Ti, Sn, and TiO2 at 1273 K in an Ar atmosphere, followed by slow cooling. Crystal structure analysis of single-crystal X-ray diffraction data indicated that the O atoms are located at a 4 g site in the Ti tetrahedron of the orthorhombic Ti6Sn5 structure. An almost single-phase polycrystalline bulk sample of Ti6Sn5O0.9 was prepared by heating a compacted powder mixture of Ti, Sn, SnO2 at 1173 K. The bulk sample exhibited metallic electrical properties.
KW - Electrical conductivity
KW - Intermetallic compound
KW - Suboxide
KW - X-ray diffraction
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U2 - 10.1016/j.mtcomm.2021.102704
DO - 10.1016/j.mtcomm.2021.102704
M3 - Article
AN - SCOPUS:85112376749
SN - 2352-4928
VL - 28
JO - Materials Today Communications
JF - Materials Today Communications
M1 - 102704
ER -