Crystallography, Unit Cells, Bravais Lattices, Miller Indices, and X-ray Diffraction Flashcards
(9 cards)
1
Q
What is crystallography
A
The study of crystal structures and their properties.
2
Q
What is a crystal lattice?
A
A 3D periodic arrangement of points where each point has an identical environment.
3
Q
What defines a crystal structure?
A
A lattice + a basis (group of atoms attached to each point)
4
Q
What is a unit cell?
A
A repeating building block of a crystal lattice that fills space without gaps.
5
Q
What is a primitive unit cell?
A
A unit cell containing exactly 1 lattice point.
6
Q
Why is X-ray used in crystallography?
A
X-ray wavelength (~1Å) matches atomic spacing (~10⁻¹⁰ m), allowing diffraction.
7
Q
What is Bragg’s Law?
A
nλ=2dsinθ
8
Q
What is the formula for plane spacing in a cubic crystal?
A
d hkl = a / h^2 +k^2+ l^2
9
Q
A
