S

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

secondary extinction
selective merohedry
semidirect product
serial reflection conditions
sharpened Patterson function
site symmetry
Sohncke groups
space group
spherical system
stabilizer
statistical descriptors
structure amplitude
structure determination
structure factor
structure-factor coefficient
subcell
subgroup
sublattice
subperiodic group
supercell
supergroup
superlattice
superposition methods
superspace
superspace group
superspace point group
symmetry element
symmetry operation
symmorphic space groups
systematic absences