Formula: KCl Potassium chloride is a potassium analog of a table salt. It has the same cubic crystalline structure and shape of crystals. Large crystals are easy to grow, but often get cloudy and badly formed.
- Crystal system: isometric
- Crystal shape: cuboid
- Color: colorless
- Stability on air: very stable
Potassium chloride is used as a fertilizer and can be obtained in gardenig stores, but precence of chloride ion makes it less popular choice than other potassium fertilizers.
Potassium chloride grows much more easily than NaCl. I used slov evapotation to produce the samples on photos.
Its solubility changes a lot with temperature: 34g/100ml at 20°C; and 51.3g/100ml at 80°C. However, in my experiments cooling of saturated solution only produced large number os thin needle-like crystals.
This compound is safe.
- Sodium chloride, NaCl. It has same crystal structure and shape, but is much harder to grow.
- Glucuse sodium chloride, 2C6H12O6·NaCl·H2O. THis is a cocrystal of table salt and glucose sugar. It has completely different crystal shape and structure, and also an easy compound to grow.