10.1 The Structures and Types of Crystals -10.1.1 Features of Crystal Structures 10.1.2*Crystal Defects -10.1.3*Amorphous Soilds,Quasicrystal 10.1.4 Types of Crystals 10.1.1 Features of Crystal Structures §10.1 The Structures and Types of Crystals 10.1.4 Types of Crystals 10.1.2* Crystal Defects 10.1.3* Amorphous Soilds, Quasicrystal