Database of Zeolite Structures
 

Framework Type DDR
Coordination Sequences and Vertex Symbols
T-atom Name
N1 to N10 (or 12)
Vertex Symbola
T1
4
11
23
39
62
91
124
159
203
251
0
0
4·5·5·5·5·8
T2
4
12
22
37
59
93
127
158
193
251
0
0
5·5·5·5·5·5
T3
4
12
25
40
61
86
119
164
212
253
0
0
5·5·5·5·5·6
T4
4
12
24
40
63
87
121
165
208
255
0
0
5·5·5·5·5·8
T5
4
10
21
37
62
94
124
158
196
252
0
0
4·4·5·5·6·8
T6
4
12
24
39
57
93
121
157
210
240
0
0
5·5·5·5·5·5
T7
4
12
24
33
60
97
136
150
192
264
0
0
5·5·5·5·5·5

aSize and number of smallest ring on each angle of the T-atom (M. O'Keeffe and S.T. Hyde, Zeolites 19, 370 (1997))
* = no closed ring at this angle
 
Loop configuration of T-atoms:
T1 T2-4,6,7 T5


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