There are three main types of crystalline solids: ionic solids, molecular solids, and metallic solids. Ionic solids are composed of positive and negative ions arranged in a crystal lattice. They have properties like high melting points and are brittle. Molecular solids have molecules arranged in a particular configuration, and properties like low melting points and being nonconductors. Metallic solids have metal atoms or ions arranged in patterns, giving properties such as conductivity and malleability. All crystalline solids have constituents ordered in highly organized, repeating microscopic structures extending in three dimensions.

1. Lesson 5Lesson 5
Crystalline Solids

2. ObjectiveObjective
To describe the 3
types of crystalline
solids

3. Crystalline SolidsCrystalline Solids
a solid material whose
constituents, such
as atoms, molecules or ions, are
arranged in a highly ordered
microscopic structure,
forming a crystal lattice that
extends in all directions.

4. Shapes of Crystalline SolidsShapes of Crystalline Solids

6. Crystal SystemsCrystal Systems
14 Bravais Lattices14 Bravais Lattices
Ref: www.seas.upenn.edu;
Solid State Chemistry

7. TypesTypes
1.)1.) Ionic SolidsIonic Solids
is an ionic compoundis an ionic compound
composed of positive andcomposed of positive and
negative ions.negative ions.

8. 2.)2.) Molecular SolidsMolecular Solids
has molecules arranged in ahas molecules arranged in a
particular configuration.particular configuration.

9. 3.)3.) Metallic SolidsMetallic Solids
has atoms of metals arrangedhas atoms of metals arranged
in a different pattern . It isin a different pattern . It is
made up of metal ionsmade up of metal ions
surrounded by valencesurrounded by valence electrons.electrons.

10. PropertiesProperties
1.) IONIC SOLIDS1.) IONIC SOLIDS
high melting pointhigh melting point
hard and brittlehard and brittle
slightly solube to waterslightly solube to water
conductor of electricity when meltedconductor of electricity when melted
or in a solutionor in a solution
EXAMPLES: NaCl, CaCO3, MgSO4EXAMPLES: NaCl, CaCO3, MgSO4

11. 2.) Molecular Solids2.) Molecular Solids
low melting pointlow melting point
insoluble in waterinsoluble in water
nonconductor of electricitynonconductor of electricity
EXAMPLES: C10Hg, C6H12O6EXAMPLES: C10Hg, C6H12O6

12. 3.) Metallic Solids3.) Metallic Solids
low to high melting pointlow to high melting point
malleablemalleable
ductileductile
conductor of electricityconductor of electricity
insoluble in most solventsinsoluble in most solvents
EXAMPLES: Fe, Ag, AuEXAMPLES: Fe, Ag, Au
Ref: Book ni sirRef: Book ni sir

13. CompositionComposition
1.) Atoms or molecules are
arranged in an order.
2.) Have a uniform chemical
composition

14. EXAMPLESEXAMPLES
Quartz

15. Calcite