C 2v #1
C 2v #2
C 2v #3
C 2v #4
C s #1
C 2 #1
C 2 #2
C 2 #3/C 1 #4
C 2 #4/C 1 #2
C s #2
C 1 #5
C 1 #6
C 1 #7
C s #3
C s #1
C s #2
C 1 #1
C 1 #2
D 3h #1
D 3h #2
D 3
C 3h
C 2v #1
C s #1
C s #2
C 3 #1
C 3 #2
C 2v #2
C 2 #1
C 1 #1
C 1 #2
C 1 #3
Fig. 1 Structure of Triborate Ion, [B 3 O 3 (OH) 3+n ]
n− , n = 1 − 3. A bold symmetry label indicates
a minimum energy structure
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