Chemistry Reference
In-Depth Information
Fig. 13 The TiO
2
(rutile) net
(
P
4
2
/
mnm
) and some related
structures of oxoacid salts:
Ti(SeO
3
)
2
;
-Cu(IO
3
)
2
and
isotypic M(IO
3
)
2
(
P
2
1
)
a
Table 8 Underlying nets in chlorates, bromates, and iodates
Underlying
net
Chlorate/bromate/iodate
Correspondence LO
3
coordination
type
T
33
,T
6
,T
42
pcu-b
(NaCl)
MClO
3
; MBrO
3
(M
¼
Na, K, Rb, Tl); MIO
3
Normal
(M
¼
K, Tl)
T
6
nia (NiAs)
MIO
3
(M
¼
Li, Na)
Normal
T
4
crb (CrB
4
)
b
-LiIO
3
Normal
T
5
nia-5,5-
Pna
2
1
g
-LiIO
3
T
6
FEQWOO
NaIO
3
T
6
Tl
2
S
2
AgClO
3
Normal
T
331
,T
61
,
T
52
kwh
CsBrO
3
; MIO
3
(M
¼
K, Rb)
T
331
bcu-7-
Pnnm
CsIO
3
T
3
rtl (TiO
2
,
rutile)
M(IO
3
)
2
(M
¼
Mg, Mn, Co, Cu)
Normal
T
31
scu (BaTe
2
)
Ba(LO
3
)
2
(L
¼
Br, I)
Normal
T
31
,T
4
sqc
1964
M(ClO
3
)
2
(M
¼
Sr, Ba, Pb); Ba(BrO
3
)
2
B
2
acs (WC)
M(IO
3
)
3
(M
¼
Al, Fe, Ga, In)
Normal
Table
7
); they emerge in
modifications of Sn(SeO
3
)
2
, respectively. The
the relation between
a
and
b
b
3.2.2 Chlorates, Bromates, and Iodates
The relations of chlorates, bromates, and iodates to binodal nets are quite similar to
sulfites and selenites owing to the like geometry and coordination capability of their
oxoanions; the differences are mainly caused by a smaller charge of the chlorate-,
bromate, or iodate oxoanions compared to sulfite or selenite ones and, hence, other
g
¼
1:1. The general trend in the cation array topology follows the features
described in the previous part. Large alkali cations promote the pcu-b underlying
net, while smaller ones tend to form the NiAs-like underlying net. In both cases, the
underlying nets are geometrically distorted in comparison with the ideal pcu-b and
