RbSbO₃: A Simple Structure with Complex Polytypism

RbSbO 3 crystallizes in different polytypes composed of trigonal [SbO 3 ] − and [Rb] + layers, which can appear in two orientations with respect to m <100> and m <120> , respectively. The order–disorder (OD) polytype family comprises four polytypes of a maximum degree of order (MDO), of which two are realized in actual crystals: MDO 1 (, c ≈ 19.8 Å, isotypic to ilmenite‐like KSbO 3 ) and MDO 2 (, c ≈ 39.2 Å, isotypic to AgRuO 3 )....