#113
P-421m
Example – (NF4)(BF4)
Crystal structure of tetrafluoroammonium salts
Christe, K.O.; Lind, M.D.; Thorup, N.; Russell, D.R.; Fawcett, J.; Bau, R.
Inorganic Chemistry (1988) 27, p2450-p2454
CIF
http://1drv.ms/1nwPOYv
NF4 tetrahedra (blue)
BF4 trigonal pyramids (pink)