Chemistry Reference
In-Depth Information
α
Figure 1.23. Crystal structure of
p
-NPNN. (a)
-phase projected along the
b
-
axis,
P
2
1
/
=
.
=
.
=
.
β
=
.
62
◦
. Crystal-
c
,
a
0
730 nm,
b
0
762 nm,
c
2
468 nm,
93
lographic data from Tamura
et al.
, 2003. (b)
β
-phase projected along the
c
-axis,
Fdd
2,
a
=
1
.
096 nm,
b
=
1
.
935 nm,
c
=
1
.
235 nm. Crystallographic data from
-phase projected along the
c
-axis,
P
1,
a
Awaga
et al.
, 1989. (c)
γ
=
0
.
919 nm,
35
◦
,
44
◦
,
22
◦
. Crystal-
b
=
1
.
210 nm,
c
=
0
.
647 nm,
α
=
97
.
β
=
104
.
γ
=
82
.
lographic data from Turek
et al.
, 1991. (d)
δ
-phase projected along the
c
-axis,
25
◦
. Crystallo-
graphic data from Tamura
et al.
, 2003. C, N and O atoms are represented by black,
medium grey and light grey balls, respectively. H atoms are not represented for
clarity.
P
2
1
/
c
,
a
=
0
.
896 nm,
b
=
2
.
380 nm,
c
=
0
.
673 nm,
β
=
104
.
