Database of Zeolite Structures
 

Framework Type ETR
Coordination Sequences and Vertex Symbols
T-atom Name
N1 to N10 (or 12)
Vertex Symbola
T1
4
9
18
31
45
63
86
111
140
172
210
253
4·4·4·8·84·103
T2
4
9
17
28
41
57
80
113
151
189
226
260
4·4·4·6·8·86
T3
4
9
17
28
43
62
83
109
138
170
214
255
4·4·4·82·6·104
T4
4
9
16
25
39
58
80
107
143
185
220
254
4·4·4·6·6·8

aSize and number of shortest 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:
T1-4