Bilbao Crystallographic Server
Common subgroups of two space groups
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Common Subgroups of two Space Groups
Common Subgroups
COMMONSUBS
calculates the common subgroups of two space groups given:
A maximum k-index which defines the maximum cell multiplication in the subgroup.
A ratio between the k-indices i
_{k2}
/i
_{k1}
of the common subgroup.
Only the
default choice
for the conventional setting of the space groups is used.
Please, enter the sequential number of the space group 1 as given in
International Tables for Crystallography
, Vol. A or
choose
it:
Please, enter the sequential number of the space group 2 as given in
International Tables for Crystallography
, Vol. A or
choose
it:
Ratio between k-indices i
_{k2}
/i
_{k1}
HINT:
The ratio between i
_{k2}
/i
_{k1}
is equal to Z
_{p1}
/Z
_{p2}
being Z
_{p1}
, Z
_{p2}
the number of formula units per primitive unit cells.
Maximum k-index
1
2
3
4
8
9
12
16
NOTE
: the program uses the
default choice
for the group setting.
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