PrepZii

table

Seven Crystal Systems

The Solid State chapter begins with lattice parameters, Bravais lattice types, and examples.

System	Axial relation	Angle relation	Bravais lattices	Example
Cubic	$a=b=c$	$\alpha=\beta=\gamma=90^\circ$	SC, BCC, FCC	NaCl
Orthorhombic	$a\ne b\ne c$	$\alpha=\beta=\gamma=90^\circ$	SC, BCC, end centred, FCC	$S_R$
Tetragonal	$a=b\ne c$	$\alpha=\beta=\gamma=90^\circ$	SC, BCC	$Sn, ZnO_2$
Monoclinic	$a\ne b\ne c$	$\alpha=\gamma=90^\circ\ne\beta$	SC, end centred	$S_M$
Rhombohedral	$a=b=c$	$\alpha=\beta=\gamma\ne90^\circ$	SC	Quartz
Triclinic	$a\ne b\ne c$	$\alpha\ne\beta\ne\gamma\ne90^\circ$	SC	$H_3BO_3$
Hexagonal	$a=b\ne c$	$\alpha=\beta=90^\circ,\ \gamma=120^\circ$	SC	Graphite