2 edition of Phase relations in the lead-bismuth sulfide, selenide and telluride systems found in the catalog.
Phase relations in the lead-bismuth sulfide, selenide and telluride systems
Edmund A Cortellini
Written in English
|Statement||by Edmund A. Cortellini|
|The Physical Object|
|Pagination||136 leaves ;|
|Number of Pages||136|
Lead selenide (PbSe), or lead(II) selenide, a selenide of lead, is a semiconductor forms cubic crystals of the NaCl structure; it has a direct bandgap of eV at room temperature. (Note that incorrectly identifies PbSe and other IV–VI semiconductors as indirect gap materials.) It is a grey crystalline solid material.. It is used for manufacture of infrared detectors for CAS Number: Tellurium is used in the new phase change memory chips developed by Intel. Bismuth telluride (Bi 2 Te 3) and lead telluride are working elements of thermoelectric devices. Lead telluride is used in far-infrared detectors. Other uses. Tellurium compounds are used as pigments for ciation: /tɪˈljʊəriəm/ (tə-LEWR-ee-əm).
Schematic representation on the changes to band structure expected in the region of the Fermi level on progressing from sulfide to selenide to telluride, illustrating the increase in VB width and the corresponding decrease in effective mass of the carriers, in this case holes, and narrowing of Cited by: 4. nitrogen, metal-sulphide (selenide and telluride) stretch ing frequencies have been astigned in the low frequency inf'ra-red region. Both ligand field and ligand to metal charge transfer t;ransi tions have been observed in the visible and ultra-violet retojion of the spectra and assib~ents have been made.
[Clausthalite] Pašava, J., Sulovský, P., Kovalová, M. (): Geochemistry and mineralogy of Proterozoic metal-rich black shales from the Bohemian massif, Czech Republic, with a description of possible new molybdenum selenide and telluride phases. Can. Introduction Gold-(silver)-telluride-(selenide) deposits are not described as a discrete class of ore deposit. Many fall, instead, into the more familiar classes of epithermal, orogenic and intrusion-related deposits, with their distinctive character linked to telluride-, and more rarely, seleniderich mineralogy, rather than any shared genesis.
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Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore depositsCited by: the Pb- and Bi-containing systems sulfide and selenide, selenide and telluride, and sulfide and telluride.
Phase relations among lead sulfbismuthinides were studied by Van Hook () and Craig (). There are four lead sulfbismuthinides stable along the join PbS-BirS.: PbnBios,r, PbsBi6S,7, PbBizSo, and PbBinSr.
The. "Phase Relations in the Selenide Telluride Systems". Geochemistry, mineralogy and genesis of gold deposits. Taylor & Francis. – ^ ^ v. Born, Abh. Privatges.
Böhmen 5 (): ^ Rupprecht, von, A. "Über den vermeintlichen siebenbürgischen natürlichen Spiessglaskönig" [On the supposedly native antimony of. Phase relations in the lead-bismuth sulfide of experimental data from these systems has permitted examination and extrapolation of phase relations within the Ag-Bi-Pb-S quaternary system.
— In the Ag-Bi-S system liquid immiscibility fields exist in the metal-rich portion above ±3°C and in the sulfur-rich Cited by: The components of the system examined, i.e.
thallium telluride and bismuth selenide, were prepared from pure elements: thallium mass%, bismuth mass%, selenium mass% and tellurium mass% (all from Aldrich Chemical Co.).Cited by: 2. USA USA USA USA US A US A US A US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords thallium bismuth ternary sulfur selenides Prior art date Legal status (The legal status is an assumption and is not a Cited by: 7.
Occurrence and mineral chemistry of bismuth sulfide telluride selenide solid solutions (ingodite, joséite, and unnamed phase) in the Nakdong deposit, South Korea. A 'read' is counted each time. 32 nd IGC () Session G ’Telluride and selenide minerals related to gold- and platinum-group elements’, 32 nd IGC, Florence, Italy, CD-ROM Abstract vol ume, part 1, abstracts ,- From the phase diagram of a condensed bismuth telluride–indium selenide quaternary system, it is expected that each of the four components will melt at °C.
The quaternary system examined here comprises two immiscible compounds: Bi 2 Te 3 –indium selenide, where each individual compound exhibits good thermoelectric properties.
Fig. 1(a) and (b) show the microstructures of the water Cited by: 3. Telluride mineral: | A |telluride mineral| is a |mineral| that has the |telluride anion| as a main component. World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled.
To find out more, see our Privacy and Cookies policy. Electronic structure of bismuth telluride and bismuth selenide Figure 2. Electronic band structures for Bi2Te3 (a) and Bi2Se3 (b) obtained from LMTO-LDA calculations with spin–orbit coupling included.
For Bi2Te3, the valence-band maximum occurs along the 0–a direction (the inset of ﬁgure 3 shows the location of the point ‘a’ in. While perfect stoichiometric bismuth selenide should be a semiconductor (with a gap of eV) naturally occurring selenium vacancies act as electron donors and it often acts as a semimetal.
Topologically protected surface states have been observed in Bismuth selenide, which is the subject of ongoing scientific al formula: Bi₂Se₃. Sulfide Mineralogy and Geochemistry by David J. Vaughan,available at Book Depository with free delivery worldwide.
Buy Sulfide Mineralogy and Geochemistry (Reviews in Mineralogy & Geochemistry) on FREE SHIPPING on qualified orders4/5(1). Molecules, an international, peer-reviewed Open Access journal. Selenium substituents which are disposed β to an electron deficient centre, such as a carbocation p-orbital, or the π* orbital of an electron deficient p-system, interact in a stabilising way by a combination of C-Se hyperconjugation (σ Se-C –π* interaction), and a through-space homoconjugative n Se –π* interaction.
Bismuth telluride is a compound of tellurium and bismuth. When alloyed with selenium or antimony, it acts as an efficient thermoelectric material suitable for portable power generation or refrigeration.
It is a narrow gap layered semiconductor with a trigonal unit cell. It. The Bi-Se (Bismuth-Selenium) S y s t e m H. O k a m o t o A s a h i University Equilibrinm Diagram The definition of a "phase" in the Bi-Se system is somewhat vague. Bi2Se 3 is the most dominant. Frc. I Schematic phase relations in the condensed Cu-Pb-S system at 'C.
The reduction in size of the two-liquid fields and the appearance of Pbs, ccu", and Cu result in phase relations at oC as shown in Figure 2. At 'C the central sulfide liquid is reduced to a small four-sided areaFile Size: 1MB. Doped bismuth sesquitelluride, Doped bismuth telluride, Doped bismuth tritelluride, Doped tellurobismuthite [Note: Doped with selenium sulfide.
Commercial mix may contain 80% Bi 2 Te 3, 20% stannous telluride, plus some tellurium.].Many selenide minerals have often gone unnoticed in years past, an in many cases, selenium is present as traces in normal sulfide minerals.
Only in recent times have mineralogists routinely recognized the difference between the standard silver sulfide acanthite (argentite) and the lesser known silver selenide.
How to cite this article: Lee, Y. et al. Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide. Nat. Cited by: