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3 Crystals
Published in D.M. Rowe, CRC Handbook of Thermoelectrics, 2018
A review of the physical properties of (Bi|.xSbx)2Te3 is given in References 3 and 4. The lattices of the isomorphous semiconductors Sb2Te3, Bi2Te3, and Bi2Se3 (tetradymite Bi2Te2S structure) which crystallize in the trigonal system, have a rhombohedral unit cell which is based on five atoms per molecule. In order to demonstrate more clearly the layered structure which is typical of these crystals a transformation into the hexagonal system is frequently carried out, as exemplified by the Bi2Te3 crystal in Figure 1.
Nonadamantine Semiconductors and Variable-Composition Semiconductor Phases
Published in Lev I. Berger, Semiconductor Materials, 2020
Currently, the V2-VI3 compounds with tetradymite structure, SbjTe^ Bi2Se3, and BijTej, and their solid solutions are the most important materials for low-temperature thermoelectric applications on the industrial scale, in the form of both single crystals and ceramics.7.3217.324 The commercial availability of the V2-VI3 compounds is described in Table 7.27.
Future of photovoltaic materials with emphasis on resource availability, economic geology, criticality, and market size/growth
Published in CIM Journal, 2023
G. J. Simandl, S. Paradis, L. Simandl
In the past, Te was processed from Au-Te ores at the Vatukoula (formerly Emperor Gold Mine) epithermal deposit in Fiji, but it is not currently being recovered (Börner et al., 2021). Since the 1990s, few deposits were reported in literature as being mined primarily for Te. Two of these are vein systems in southwestern China, commonly referred to as Dashuigou and Majiagou (Goldfarb et al., 2017; Mao et al., 2002; Yin & Shi, 2020), where Te is present largely in tellurides, mainly tetradymite (Yin & Shi, 2020). The Dashuigou deposit was mined as a source of sulfur (S) for 10 years before Te was discovered in corresponding tailings. The deposit was recognized as a source of Te and later, Au, Bi, Ag, and Se were confirmed as possible co-products (Jingwen, Yuchuan, & Jiaxiu, 1995). After more than 35 years, the search for environmentally and economically acceptable methods to extract Te from Dashuigou is ongoing (Shao, Diao, Ji, & Li, 2020), and the same applies to other telluride-bearing veins (e.g., Yang et al., 2019).