Phosphorus

Crystalline forms of the phosphorus (see phase diagram in [Clark10]):

3D		bcc	>258GPa	metal
3D		sc	>10GPa	metal
layered (black-P)		A7	>5GPa	semimetal
layered (black-P)	black-P	A17	stable phase	semiconductor
polymeric (red-P)	monoclinic-P	mP84	Hittorf's-P	widegap semiconductor
polymeric (red-P)			amorphous	widegap semiconductor
molecular (white-P)	α-P4	cI232*	stable phase	insulator
	β-P4	aP24	<196K
	γ-P4		<150K

* I-43m α-Mn structure, a=18.51, 58 molecules per unit cell