Due to the low cost and abundance of sodium element layered Na0.67Ni0.33Mn0.67O2 is a very promising class of material for batteries with good electrochemical properties foreseen for large-scale energy storage on electric vehicle and energy grid systems alternative to lithium batteries. Pn and Om type materials represent prismatic and octahedral crystal strcutures, respectively. The aim of this experiment is to establish the detailed crystal structure, the occupation of low mass atoms (oxygen and sodium) as well as the location of oxygen vacancies in different structures by the use of neutrons, which can provide theoretical footprint for further research on sodium ion battery materials.