Phase diagram and local environment of Sn and Te: SnTeBi and SnTeBi2Te3 systems |
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| Institution: | 1. Laboratoire de chimie minérale, université de Cocody, UFR des sciences des structures de la matière et de technologie, 22 BP 582 Abidjan 22, Ivory Coast;2. Laboratoire des agrégats moléculaires et matériaux inorganiques, ESA 5072, université Montpellier-2, place Eugène-Bataillon, 34095 Montpellier, France;1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China;2. Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, USA;3. Characterization Department, Idaho National Laboratory, Idaho Falls, ID 83415, USA;4. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;5. Department of Chemical Engineering and Materials Science, University of California, Irvine, Irvine, CA, 92697, USA;1. Department of Physics, Dr. N.G.P Institute of Technology, Coimbatore 641048, India;2. Department of Physics, Coimbatore Institute of Technology, Coimbatore 641014, India;1. Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06520, USA;2. Energy Sciences Institute, Yale West Campus, West Haven, CT 06477, USA;3. Nanotechnology Systems Division, Hitachi High Technologies America, Inc., Clarksburg, MD 20871, USA;4. Canadian Institute for Advanced Research Azrieli Global Scholar, USA;1. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China;2. Materials Genome Institute, Shanghai University, Shanghai, 200444, China |
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| Abstract: | From thermal analyses and X-ray diffraction the phase diagram of the Bi SnTe and SnTeBi2Te3 sections was determined. The local environment of Sn and Te atoms was studied by 119Sn and 125Te Mössbauer spectroscopy. The BiSnTe section showed a eutectic reaction at 267 °C and 20 % mole SnTe–80 % mole Bi. No intermediate compound was detected. The SnTeBi2Te3 section is characterized by a eutectic reaction at 585 °C and 40 % mole SnTe–60% mole Bi2Te3 and a peritectic reaction at 600 °C and 50 % mole SnTe–50% mole Bi2Te3. It corresponds to the compound SnBi2Te4, which has a rhombohedral layered structure with unit cell parameters a=4.3954(4) Å and c=41.606(1) Å. © 2000 Académie des sciences / Éditions scientifiques et médicales Elsevier SASSnTe / Bi / Bi2Te3 / phase diagram / Mössbauer |
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