The inco
mmensurate,
modulated crystal structures of Sr
1+x(Co
xMn
1-x)O
3 (
x ![](/i<font color=)
mages/entities/ap.gif"> 0.266 and0.280) have been refined by a (3+1)D superspace profile analysis of neutron powder diffractiondata. The structures are related to the 2H perovskite structure and consist of two subsyste
ms,[Co
xMn
1-xO
3]
mages/entities/infin.gif"> chains containing face-sharing MnO
6 octahedra and CoO
6 trigonal pris
ms(albeit with so
me cation site inversion), separated fro
m each other by [Sr]
mages/entities/infin.gif"> chains. Theobserved structures are closely related to those expected for the idealized co
mpositions Sr
14Co
3Mn
8O
33 and Sr
9Co
2Mn
5O
21. Both of the co
mpositions investigated show hysteresis in their
magnetic behavior below 13 K.