Space Group 74 :
I m m a
(
Return
link to main list of space groups in standard settings.)
(a).
I m m a
with origin at 2/
m
and
mm
2 at 0,1/4,
z
.
(b).
I m m a
with origin at 2/
m
and
mm
2 at 1/4,0,
z
.
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Birkbeck College, University of London.