Redetermination of the low-temperature polymorph of Li₂MnSiO₄ from single-crystal X-ray data

Acta Cryst. (2012). E68, i68-i69 (http://doi.org/h93)

Structure model of Li₂MnSiO₄ determined by the present study with projection view along [001]. Polyhedra are indicated by red color for LiO₄, blue color for MnO₄, and green color for SiO₄.

Dilithium manganese(II) orthosilicate, Li₂MnSiO₄, is currently investigated as an alternative cathode material in lithium ion batteries. The redetermination of the crystal structure of the low-temperature polymorph based on single-crystal X-ray data revealed a perfectly site-ordered model for the Li and Mn sites, consistent with recent solid-state NMR studies. The structural set-up can be derived from a distorted hexagonal close-packed arrangement of O atoms with half of the tetrahedral voids occupied by the three types of cations.