  Strongly correlated ground states and exotic quasiparticle excitations in
low-dimensional systems are central research topics in the solid state research
community. The present work develops a new layered material and explores the
physical properties. Single crystals of 3R-Na2MnTeO6 were synthesized via a
flux method. Single crystal x-ray diffraction and transmission electron
microscopy reveal a crystal structure with ABC-type stacking and an R-3 space
group, which establishes this material as a stacking polytype to previously
reported 2H-Na2MnTeO6. Magnetic and heat capacity measurements demonstrate
dominant antiferromagnetic interactions, the absence of long-range magnetic
order down to 0.5 K, and field-dependent short range magnetic correlations. A
structural transition at ~ 23 K observed in dielectric measurements may be
related to displacements of the Na positions. Our results demonstrate that
3R-Na2MnTeO6 displays low-dimensional magnetism, disordered structure and
spins, and the system displays a rich structure variety.
