What are 4 different crystalline substances?

sodium chloride
magnesium sulfate\
zinc sulfide
copper(II) sulfate

To identify four different crystalline substances, you can explore various sources such as chemistry textbooks, databases, or educational websites. However, I will give you an explanation of how you can determine four different examples of crystalline substances:

1. Sodium Chloride (NaCl): Commonly known as table salt, it is an ionic compound made up of sodium cations (Na+) and chloride anions (Cl-). These ions arrange themselves in a repeating pattern to form the crystal lattice structure.

2. Magnesium Sulfate (MgSO4): Also known as Epsom salts, magnesium sulfate is a compound of magnesium cations (Mg2+) and sulfate anions (SO42-). It crystallizes as hydrated crystals with water molecules incorporated into its structure.

3. Zinc Sulfide (ZnS): This is a binary compound consisting of zinc cations (Zn2+) and sulfide anions (S2-). ZnS can have two different crystal structures: cubic (sphalerite) or hexagonal (wurtzite).

4. Copper(II) Sulfate (CuSO4): Copper(II) sulfate is a compound of copper cations (Cu2+) and sulfate anions (SO42-). It forms blue crystals with a monoclinic crystal structure. This compound is commonly used in various applications, including as a fungicide or for electroplating.

Remember, you can find more examples by conducting further research or consulting relevant educational resources.