Where the ions of potassium are positively charged and those of cyanide are negatively charged. With the nitrogen ion, carbon has 3 bonds. It resembles the crystal structure of crystalline NaCl. Hydrolysis (the conversation with water) causes the soaked solid to launch trace portions of hydrogen cyanide. A typical description https://potassiumcyanidesuppliers37036.blogdon.net/the-2-minute-rule-for-potassium-cyanide-picture-45790882