M. Nespolo and M. I. Aroyo, Acta Crystallogr, p.523, 2016.

P. F. Schofield, K. S. Knight, and I. C. Stretton, Am. Mineral, vol.81, p.847, 1996.

, To the best of our knowledge, the first to point out the neglected existence of two settings of this type of space group was Howard Flack, pp.1943-2017

, The order of a space group is always infinite, but the index of a subgrou

E. Koch and W. Fischer, Z. Kristallogr, vol.221, p.1, 2006.

M. Nespolo, J. Appl. Crystallogr, vol.48, 1985.

N. Sugano and A. Kyono, Phys. Chem. Miner, p.381, 2018.

M. Nespolo, Phys. Chem. Miner, p.391, 2018.

V. Pet?í?ek, M. Dusek, and L. Palatinus, Z. Kristallogr, p.345, 2014.

C. Capillas, E. S. Tasci, G. De-la-flor, D. Orobengoa, J. M. Perez-mato et al., Z. Kristallogr, vol.226, p.186, 2011.

M. I. Aroyo, J. M. Perez-mato, C. Capillas, E. Kroumova, S. Ivantchev et al., Z. Kristallogr, p.15, 2006.

M. I. Aroyo, International Tables for Crystallography Volume A: Space-group symmetry, p.874, 2016.

M. Renninger, Z. Phys, vol.106, p.141, 1937.

W. R. Busing and H. A. Levy, Acta Crystallogr, vol.10, p.180, 1957.

M. ____________________________________________________________________________________________-m.-nespolo, A. Tokuda, and . Yoshiasa, , p.12