Arsenide iodide
Class of chemical compounds
Arsenide iodides or iodide arsenides are compounds containing anions composed of iodide (I− ) and arsenide (As3− ). They can be considered as mixed anion compounds . They are in the category of pnictidehalides . Related compounds include the arsenide chlorides , arsenide bromides , phosphide iodides , and antimonide iodides .
List
formula
system
space group
unit cell Å
volume
density
comment
ref
Ca2 AsI
trigonal
R 3 m
a=4.397, c = 22.29, Z = 3
3.76
brown
[ 1] [ 2]
Ca3 AsI3
cubic
I 41 32
a=12.42
3.99
colourless
[ 1]
Cu2 P1.8 As1.2 I2
monoclinic
P 21 /c
a = 15.477, b = 13.200, c = 15.421, β = 115.406°, Z = 16
Cu exchangeable with Ag; band gap 1.2 eV
[ 3]
Ge38 As8 I8
cubic
P 4 3m
a=10.611
metallic; water and air stable
[ 4]
Ag2 P1.8 As1.2 I2
monoclinic
P 21 /c
a = 15.84, b = 13.68, c = 15.58 and β = 117.63° Z=16
[ 5]
Sn24 As19.3 I8
cubic
a=22.179 Z=8
black
[ 6]
Sn20.5 □3.5 As22 I8
cubic
a =22.1837
low thermal conductivity
[ 7]
Sn24 Asx P19.3−x I8 x=0-16
cubic
Pm3n
a = 10.9358—11.1495
[ 8]
Sn19.3 Cu4.7 As22 I8
cubic
Pm 3 n
a = 11.1736 Z = 1
1394.4
6.236
clathrate; Zintl; diamagnetic
[ 9]
Sn24–x –δ Inx As22–y I8
cubic
Pm 3 n
a = 11.088 (x = 0) to a = 11.343 (x = 10.7)
clathrate
[ 10]
La2 AsI2
trigonal
P 3 m1
a=4.3795 c=10.910
5.56
[ 11]
Hg4 AsI5
orthorhombic
Cmca
a=11.927 b=12.128 c=19.776 Z=8
2859.0
7.025
red
[ 12]
Hg4 As2 I3
cubic
Pa 3
a=12.999 Z=8
2196
8.06
black
[ 13]
HgI2 ⋅As4 S4
monoclinic
P 21 /c
a=9.433 b=14.986 c=11.624 β =127.72° Z=4
1299
4.509
orange; dec 212 °C
[ 14]
Hg5 AsS2 I3
monoclinic
C 2/c
a=13.339 b=8.444 c=13.428 β =118.352 Z=4
1331.2
7.599
black; dec 150 °C
[ 15]
Hg3 AsSe4 I
hexagonal
P 63 mc
a = 7.6902, c = 9.968 Z=2
red; air stable
[ 16]
[Hg7 As4 ](AgI3 )2
cubic
Pa
a = 13.138 Z = 4
[ 17] [ 18]
(Hg2 As)2 (CdI4 )
monoclinic
P 21
a =7.945, b =12.934, c =8.094, β =116.898°
741.7
[ 19]
[Hg7 As4 I3 ](SnI3 )
cubic
P 21 3
a = 13.110, Z = 4
2253.2
7.617
black
[ 20]
References
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^ Hadenfeldt, C.; Herdejürgen, H. (February 1987). "Darstellung und Kristallstruktur der Calciumnitridhalogenide Ca2NCl und Ca2NBr" . Zeitschrift für anorganische und allgemeine Chemie (in German). 545 (2): 177–183. doi :10.1002/zaac.19875450220 . ISSN 0044-2313 .
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Salts and covalent derivatives of the
iodide ion