Description:
<jats:title>Abstract</jats:title><jats:p>The crystal structure of K[BF<jats:sub>3</jats:sub>(CN)] (<jats:italic>Pbcn</jats:italic> (Nr. 60) with <jats:italic>a</jats:italic> = 13.3486(15) <jats:italic>b</jats:italic> = 6.5239(7) <jats:italic>c</jats:italic> = 10.0085(11) Å, and eight formula units per unit cell) has been determined and the one of K[BF<jats:sub>2</jats:sub>(CN)<jats:sub>2</jats:sub>] was confirmed and improved. The different networks in the complete series of borates K[BF<jats:sub>x</jats:sub>(CN)<jats:sub>4–x</jats:sub>], <jats:italic>x</jats:italic> = 0–4 are compared and discussed.</jats:p>