Single crystal X-ray analysis of NaSb2F7 have been carried out and cel
l parameters are determined. From thermal analysis the weight loss, th
ermal stability and decomposition temperatures have been determined. T
he d.c. electrical conductivity of NaSb2F7 at (100), (010) and (001) o
rientations have been carried out in the temperature range from 30 deg
rees C to 175 degrees C. Dielectric constant (epsilon') and dielectric
loss (tan delta) have been measured in the range from 0.1 KHz to 100
KHz and at temperatures between 30 degrees C to 175 degrees C.