Seven Types of Crystal System and Their Properties
DIFFERENT TYPES OF CRYSTAL SYSTEM
1. Cubic system
Properties ➡ a=b=c & α=β=γ=90°
Examples ➡️ NaCl, KCl, diamond
2.Tetragonal System
Properties ➡️ a=b≠c & α=β=γ=90°
Examples ➡️ TiO2, ZnO, Sn
3. Orthorhombic System
Properties ➡️ a≠b≠c & α=β=γ=90°
Examples ➡️ Rhombic sulphur, KNO3
4. Monoclinic System
Properties ➡️ a≠b≠c & α=γ=90° & β≠90°
Examples ➡ Monoclinic Sulphur, Na2SO4.10H2O
5. Hexagonal System
Properties ➡️ a=b≠c & α=β=90° & γ=120°
Examples ➡ Graphite, CdS, PbI2
6. Rhombohedral or Trigonal System
Properties ➡ a=b=c & α=β=γ≠90°
Examples ➡ Calcite, NaNO3
7. Triclinic System
Properties ➡ a≠b≠c & α≠β≠γ≠90°
Examples ➡ CuSO4.5H2O, K2Cr2O7, H3BO3
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