MSE 182 Quiz #1 (ONLY CRYSTAL SYSTEM DIMS.) - Fall 2026

All the things that need to basically just be memorized. the crystal systems, their (inter)axial relationships, common cubic/hex structures)

What are the three [4] common crystal structures that must be memorized entirely?

simple cubic (SC)

face-centered cubic (FCC)

body-centered cubic (BCC)

[hexagonal close pocked (HCP)]

In the CUBIC CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a = b = c

In the CUBIC CRYSTAL SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = β = γ = 90°

In the HEXAGONAL CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a = b ≠ c

In the HEXAGONAL CRYSTAL SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = β = 90°; γ = 120°

In the TETRAGONAL CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a = b ≠ c

In the TETRAGONAL CRYSTAL SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = β = γ = 90°

In the RHOMBOHEDRAL/TRIGONAL CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a = b = c

In the RHOMBOHEDRAL/TRIGONAL SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = β = γ ≠ 90°

In the ORTHORHOMBIC CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a ≠ b ≠ c

In the ORTHORHOMBIC SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = β = γ = 90°

In the MONOCLINIC CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a ≠ b ≠ c

In the MONOCLINIC SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α = γ = 90° ≠ β

In the TRICLINIC CRYSTAL SYSTEM, what are the AXIAL relationships? (between a, b, and c)

a ≠ b ≠ c

In the TRICLINIC SYSTEM, what are the INTERAXIAL relationships? (between α, β, and γ)

α ≠ β ≠ γ ≠ 90°