7
$\begingroup$

The 'I' used for body-centered systems is for the German word Innenzentriert and the 'F' for face-centered is for Flächenzentriert, also German but what about the 'S' for a, b, or c base-centered crystals?

$\endgroup$

1 Answer 1

8
$\begingroup$

S also has German origins: seitenflächenzentriert (side face centered).

Reference: International Tables for Crystallography, Volume A, Space Group Symmetry, Fifth Edition, Springer 2005, pg. 748.

One can trace a 1922 article: Niggli, P. "XII. Die Kristallstruktur einiger Oxyde I." Zeitschrift für Kristallographie-Crystalline Materials 57, no. 1-6 (1922): 253-299

enter image description here.

A German speaker can identify if this Fraktur S or C. Hard to assess for me.

In general, beware of symbolic stories. The above reference is authentic. Sometime, people tend to invent stories about symbols. My recent discovery was that of a sinc function. The whole web and plenty of books call it sinus cardinalis. It turned out to be a fictitious story. Similarly, most of Schoenflies symbols are not his inventions, and neither are Mulliken's symbols his.

$\endgroup$
1

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.