 | Acta Crystallographica Section A Acta Crystallographica Section A FOUNDATIONS AND ADVANCES |
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![[Figure 2]](me0569fig2mag.jpg)
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Figure 2
The Bravais type of the three-dimensional lattice at the upper end of a line is a special case of the type at its lower end. Solid lines indicate normal subgroups, dashed lines sets of conjugate subgroups. The number of conjugate groups in a set is equal to the subgroup index, i.e. the quotient of the orders of the corresponding point groups (4 for the transition cubic to rhombohedral and 3 in the other cases). [Fig. 2 of Grimmer (2015)  , reproduced with permission.] |
![[Figure 2]](me0569fig2.jpg)
| FOUNDATIONS ADVANCES |
ISSN: 2053-2733
