The mathematical expression of equivalence
Billiet, Y. and
Bertaut, E. F.,
International Tables for Crystallography
(2006).
Vol. A,
Section 13.1.1.1,
p.
[ doi:10.1107/97809553602060000528 ]
.
References
Bertaut, E. F. &
Billiet,
Y. (1979). On equivalent subgroups and supergroups of the space groups. Acta Cryst. A 35, 733–745. Google Scholar
Billiet,
Y. (1979). Le groupe P1 et ses sous-groupes. I. Outillage ...
Definitions
Billiet, Y. and
Bertaut, E. F.,
International Tables for Crystallography
(2006).
Vol. A,
Section 13.1.1,
p.
[ doi:10.1107/97809553602060000528 ]
and ; P 1 has only isomorphic subgroups (cf. Billiet, 1979 ; Billiet & Rolley Le Coz, 1980). For other space groups, restrictions have to be imposed on the coefficients .
References
Bertaut, E. F. &
Billiet,
Y ...
