Crystalline solids have a perfectly ordered internal structure that repeats to form a definite geometric shape, with characteristics like flat faces, sharp edges, and anisotropy. Amorphous solids lack this periodic structure and therefore have no definite shape. Crystallography studies the geometry, properties, and structure of crystalline substances, examining features like crystallographic faces, axes, and angles. Crystalline structure can be modeled as one-, two-, or three-dimensional lattices, with lattice planes representing repeating sets of parallel planes of atoms or molecules.
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Crystalline state
1. CRYSTALLINE STATE
Presented by
Ms. Sanchita G. Pimple
Assistant Professor
Department of a Chemistry,
BAR.RDIK Commerce & KD Science College ,Badnera , Amravati
Saint Gadge Baba Amravati University , Amravati, Maharashtra
2. Crystalline solid or Crystal : Solid which
has a perfectly ordered and periodic
internal arrangement of its component
particles which is repeated to give definite
geometrical shape
Characteristic
of Crystals
Flat faces and
sharp edges
Definite
interfacial
angles
Sharp melting
point
Definite co-ordination
number
Anisotropic
True solids
3. Amorphous solid : Solid which has no
periodicity in the internal arrangement of
its component particles therefore it has no
definite geometrical shape
Characteristic
of Amorphous
solid
Flat faces and
sharp edges
are absent
No definite
interfacial
angles
No sharp
melting point
No definite geometry
Isotropic
Super
cooled
liquids
4. Crystallography
It is the branch of science which deals with the study of geometry,
properties and structure of crystalline substances.
Crystallographic face Crystallographic axis
Crystallographic angles
5. Crystalline lattice or space lattice
Unidirectional lattice
Bidirectional lattice
Three Dimensional
lattice
Lattice plane