18 Questions
What is the lattice used to describe?
The arrangement of points in space
What is the term for the smallest group of atoms with the overall symmetry of a crystal?
Unit cell
What is the definition of Packing Fraction (P.F) in a unit cell?
Fraction of space occupied by atoms in a unit cell
Which term refers to the three sides of the unit cell?
Primitives
What is the basis of a crystal structure?
Group of atoms in a fixed arrangement
What are OX, OY, OZ referred to as in crystallography?
Lattice parameters
Which branch of science focuses mainly on the internal structure of crystals?
Crystallography
What is the distinguishing feature of a single crystal compared to a polycrystalline solid?
Repeats periodicity over its whole volume
Which type of crystal is characterized by comprising many individual grains that can be thought of as single crystals?
Polycrystalline solid
In crystallography, what information does crystal structure provide?
Pattern of atoms/molecules within a material
Which type of crystal has the interest primarily focused on its external shape?
Crystalline
What distinguishes single crystals from polycrystalline solids in terms of their periodicity?
Single crystals repeat periodicity over their whole volume
What is the term used to describe the angle between the sides a and c in a crystallographic structure?
β
How many fundamentally different types of unit cells are there based on their relative edge lengths and angles?
7
Who devised a system known as Miller indices to specify planes in a crystal?
W.H. Miller
How many Bravais lattices are there in total, combining primitive and non-primitive types?
14
In which lattice structure does the condition 'a≠ b ≠ c' hold true?
Triclinic
What does the term 'anisotropic' refer to in relation to physical properties of crystalline solids?
Dependence on directions within the crystal
Explore the concept of space lattice and basis in crystal structures. Understand how lattice provides a geometrical framework for describing the arrangement of points in space, and how basis contributes to defining the structure of a crystal.
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