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The antimony can be linked into chains, in which case it has a formal oxidation state of −1. Alternately it can be in pairs as Sb2, with an oxidation state of −2 for each atom.
Many of these compounds are clathrates, whereby there are two interpenetrating structures that are only weakly bound to each other by van der Waals force.
List
formula
system
space group
unit cell Å
volume
density
comment
ref
Ge38Sb8Br8
cubic
P43n
a=10.7893
756.5
clathrate
Cd2SbBr2
monoclinic
P21
a=8.244 b=9.920 c=8.492 β=116.80
Contains Sb-Sb
Hg6Sb5Br7
cubic
Pa3
a=13.003 Z=4
2198.6
7.165
black
Hg7Sb4Br6
cubic
Pa3
a = 12.9940 Z = 4
black
Hg19Sb10Br18
(Hg13Sb8)(ZnBr4)4
orthorhombic
Pnma
a=27.120 b=12.965 c=14.579 Z=4
4126
6.637
Sb2Hg3GaBr4
orthorhombic
Pnma
a = 13.7549, b = 12.690, c = 14.7819, Z = 8
red
(InBr6)Br
cubic
Pa3
a = 12.8542 Z=4
2123.91
7.395
dark red
Hg12Sb6(Br5.186I6.814)
triclinic
P1
a = 7.791 b = 11.680 c = 12.404 α = 112.76° β = 99.99° γ = 102.04° Z=1
Beck, Johannes; Neisel, Udo (2001). "Polykationische Hg-Pnictid-Gerüste mit einer neuen Füllungsvariante in den Strukturen von Hg3As2TlCl3 und Hg3Sb2TlBr3". Zeitschrift für Anorganische und Allgemeine Chemie. 627 (8): 2016–2022. doi:10.1002/1521-3749(200108)627:8<2016::AID-ZAAC2016>3.0.CO;2-N.