Bilbao Crystallographic Server arrow Minimal Supergroups List Help

Minimal supergroups (of index 2, 3 and 4) of group Cm (No. 8) [unique axis b]

Minimal Supergroups
The list with the minimal supergroup types is given in the table. Each supergroup type is specified by its ITA number and the corresponding Hermann-Mauguin symbol. Also, the index of the supergroup and the supergroup type is given. To see all the transformation matrices that relate the supergroup of a given type with the subgroup, click on the link in the column Subgroup data.

To see all possible supergroups of a given type select the type of the supergroup, and then click over [Show]

To calculate the minimal isomorphic supergroups of index greater than seven click on the link of the index.

NHM symbolITA numberIndexTypeSubgroup data
1C2/m122ttransformation...
2Cmm2352ttransformation...
3Cmc21362ttransformation...
4Amm2382ttransformation...
5Aem2392ttransformation...
6Fmm2422ttransformation...
7Imm2442ttransformation...
8Ima2462ttransformation...
9P3m11563ttransformation...
10P31m1573ttransformation...
11R3m1603ttransformation...
12Pm62ktransformation...
13Cm82ktransformation...
14Cm83ktransformation...
15Cm85ktransformation...
16Cm87ktransformation...

If you want to calculate a minimal isomorphic supergroup of higher index choose it from here:

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