crystal system
symmetry element
basic concept in crystallography
100
a = b = c, α = β = γ = 90°
Cubic
100
mirror plane
100
All crystals have basic building blocks called "_____".
unit cell
200
a = b ≠ c, α = β = γ = 90°
Tetragonal
200
How many kind of rotation axes in crystallography?
5
1,2,3,4,6
200
The unit cells are arranged in a pattern described by points
lattice point
300
a ≠ b ≠ c, α = β = γ = 90°
Orthorhombic
300
What is the term for inversion center?
i
300
How many kind of point group are there ?
32 point groups
400
a ≠ b ≠ c, α = γ = 90°, β ≠ 120°
Monoclinic
400
Rotate 120° and it appears the same.
3-fold rotational axis
400
Tell me what symmetry elements form point group.
rotation, inversion, mirror plane
500
Can you list all of crystal system?
triclinic, monoclinic, orthorhombic, tetragonal, cubic, hexagonal, trigonal
500
can you list the all of fundamental symmetry elements in crystallography?
rotation, mirror plane, inversion, translation.
500
Which crystal systems does Calcite belongs to ?
Trigonal