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Chalcogenide
- Practical Electron Microscopy and Database -
- An Online Book -
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https://www.globalsino.com/EM/
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This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
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Chalcogenide alloys (or sometimes called glasses) are a type of chemical compounds consisting of at least one chalcogen ion and one or more electropositive elements. The name is more commonly reserved for sulfides, selenides, and tellurides, rather than oxides, even though all group 16 elements of the periodic table are defined as chalcogens as shown in Table 3480a. By changing chemical compositions, most chalcogenide glasses display three elastic phase: floppy phase, isostatically rigid phase and stressed rigid phase. Table 3480b shows the standard oxidation potentials for chalcogenide anions.
Table 3480a. Chalcogen ions marked in green background. The elements in most common chalcogenides are indicated in red.
1 |
2 |
|
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
1 |
|
2 |
H |
|
He |
3 |
4 |
|
5 |
6 |
7 |
8 |
9 |
10 |
Li |
Be |
|
B |
C |
N |
O |
F |
Ne |
11 |
12 |
|
13 |
14 |
15 |
16 |
17 |
18 |
Na |
Mg |
|
Al |
Si |
P |
S |
Cl |
Ar |
19 |
20 |
|
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
32 |
33 |
34 |
35 |
36 |
K |
Ca |
|
Sc |
Ti |
V |
Cr |
Mn |
Fe |
Co |
Ni |
Cu |
Zn |
Ga |
Ge |
As |
Se |
Br |
Kr |
37 |
38 |
|
39 |
40 |
41 |
42 |
43 |
44 |
45 |
46 |
47 |
48 |
49 |
50 |
51 |
52 |
53 |
54 |
Rb |
Sr |
|
Y |
Zr |
Nb |
Mo |
Tc |
Ru |
Rh |
Pd |
Ag |
Cd |
In |
Sn |
Sb |
Te |
I |
Xe |
55 |
56 |
|
71 |
72 |
73 |
74 |
75 |
76 |
77 |
78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 |
86 |
Cs |
Ba |
{57-70} |
Lu |
Hf |
Ta |
W |
Re |
Os |
Ir |
Pt |
Au |
Hg |
Tl |
Pb |
Bi |
Po |
At |
Rn |
87 |
88 |
|
103 |
104 |
105 |
106 |
107 |
108 |
109 |
110 |
111 |
112 |
|
114 |
Fr |
Ra |
[89-102] |
Lr |
Rf |
Db |
Sg |
Bh |
Hs |
Mt |
Ds |
Uuu |
Uub |
|
Uuq |
|
|
57 |
58 |
59 |
60 |
61 |
62 |
63 |
64 |
65 |
66 |
67 |
68 |
69 |
70 |
|
|
{lanthanides} {57-70} |
La |
Ce |
Pr |
Nd |
Pm |
Sm |
Eu |
Gd |
Tb |
Dy |
Ho |
Er |
Th |
Yb |
|
|
|
89 |
90 |
91 |
92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
100 |
101 |
102 |
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{actinides} [89-102] |
Ac |
Th |
Pa |
U |
Np |
Pu |
Am |
Cm |
Bk |
Cf |
Es |
Fm |
Md |
No |
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Table 3480b. The standard oxidation potentials for chalcogenide anions.
Anion |
Standard oxidation potential |
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Oxide |
O2- - 2e- → O0, E0ox = - 3 V |
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Sulfide |
S2- - 2e- → S0, E0ox = - 0.476 V |
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Disulfide |
S22- - 2e- → 2S0, E0ox = - 0.428 V |
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Selenide |
Se2- - 2e- → Se0, E0ox = - 0.924 V |
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Telluride |
Te2- - 2e- → Te 0, E0ox = - 1.143 V |
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Table 3480c. Various classes of amorphous chalcogenide systems.
Class |
Examples |
Pure chalcogenide |
S, Se, Te, SxSe1-x |
Pnictogen-chalcogen (V-VI) |
As2S3, P2Se |
Teratogen-chalcogen (IV-VI) |
SiSe2, GeS2 |
III-VI |
B42S3, InxSe1-x |
Metal chalcogenide |
MoS3, WS3, Ag2S-GeS2 |
Chalco-halides |
As-Se-I, Ge-S-Br, Te-Cl |
Chalcogenide alloys have been applied in several areas:
i) Infrared optical fibers.
ii) Infrared windows.
iii) Photovoltaic devices.
iv) Phase change optical storage media.
v) Rewritable phase-change optical memory disks.
vi) Rewritable digital versatile disks.
vii) Nonvolatile electrical memory devices.
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The book author (Yougui Liao) welcomes your comments, suggestions, and corrections, please click here for submission. If you let book author know once you have cited this book, the brief information of your publication will appear on the “Times Cited” page.
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