B-S (Boron-Sulfur)
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Section III: Supplemental Literature Review
B-S (Boron-Sulfur) H. Okamoto
The B-S phase diagram in [Massalski2] was redrawn from [Moffatt], which was based on [1968Med] for BS2-S and [Shunk] for possible existence of various compounds. Because the delicate curvature of the liquidus in the original [1968Med] diagram was lost in repeated redrawing, the liquidus in Fig. 1 was directly copied from the original source. [2001Odi] reported the liquids between B2S3 and BS2 based on thermal analysis data. The result is shown in Fig. 1. Table 1
B-S crystal structure data were adopted from [Massalski2] (Table 1). References 1968Med: Z.S. Medvedeva, V.A. Boryakova, Ya.Kh. Grinsberg, and E.G. Zhukov, Equilibrium Diagram of the BS2-S System, Russ. J. Inorg. Chem., 1968, 13(5), p 756-758 2001Odi: I.N. Odin, V.V. Grnibko, E.V. Safronov, and V.F. Kozlovskij, Study of Systems CdX-B2X3 (X = S, Se), CdTeB-Te, Zh. Neorg. Khim., 2001, 46(7), p 1210-1214
B-S crystal structure data
Phase
Composition, at.% S
Pearson symbol
Space group
Strukturbericht designation
Prototype
(bB) B12S B4S BS B2S3 BS2 (bS) (aS)
0 7.7 20 50 60 66.7 100 100
hR108 hR* … … mC70 mP48 … oF128
R3m … … … C2/m P21/c … Fddd
… … … … … … … A16
… … … … … … … aS
Weight Percent Sulfur 0 10 20
30
40
50
60
70
80
90
100
600
L 500
417°C
Temperature, °C
400
(βB) 300
(βS)
BS2
B2S3
BS
100
B4S
B12S
200
115.22°C 95.5°C
(αS)
0 0
B
10
20
30
40
50
60
70
80
90
Atomic Percent Sulfur
Fig. 1 B-S phase diagram
540
Journal of Phase Equilibria and Diffusion Vol. 29 No. 6 2008
100
S
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