STRUCTURE-CELL DATA AND EXPANSION COEFFICIENTS OF BISMUTH TELLURIDE
STRUCTURE-CELL DATA AND EXPANSION COEFFICIENTS OF BISMUTH TELLURIDE
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DOI：
10.1088/0508-3443/9/10/307
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发表时间：
1958-01-01
期刊：
影响因子：
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通讯作者：
FRANCOMBE, MH
中科院分区：
文献类型：
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作者：
FRANCOMBE, MH
Accurate measurements of the structure-cell parameters of bismuth telluride, Bi2Te3, have been made using annealed powders and etched rods cut from single-crystal ingots. Previously reported anomalies in the X-ray powder intensity data are found to originate entirely in preferred orientation of the crystallites. A study of the thermal expansion of the unit cell over the temperature range-195 to 400 C has revealed a marked anisotropy between the axial expansion coefficients, that for the c axis (22.2× 10-6per C at 20 C) being almost twice that for the a axis (12.9× 10-6). Near 200 C changes occur in both the principal axial expansions, comparable with those observed at low temperatures in certain hexagonal metal structures.
