English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The unit cell group and the factor group are basic to the theoretical analysis of the vibrations, or electronic transitions, in crystals in the k = 0 approximation. Yet some confusion exists in the literature concerning the definitions of these groups. This paper examines the literature definitions, draws attention to inconsistencies in the literature, and describes the unit cell group and the factor group for the specific cases of the symmorphic space group, P2 / m, and the nonsymmorphic space groups P21 / m and P21 / c.

Unit Cell Group and the Factor Group in the Theory of the Electronic and Vibrational Spectra of Crystals