Allotropes of plutonium
Plutonium occurs in a variety of allotropes, even at ambient pressure. These allotropes differ widely in crystal structure and density; the α and δ allotropes differ in density by more than 25% at constant pressure.

Allotropes of plutonium

Section Title:
Table Section Text: Plutonium occurs in a variety of allotropes, even at ambient pressure. These allotropes differ widely in crystal structure and density; the α and δ allotropes differ in density by more than 25% at constant pressure.

Phase	Crystal Structure	Density (g/cm3)

alpha (α)	simple monoclinic	19.86

beta (β)	body-centered monoclinic	17.70

gamma (γ)	face-centered orthorhombic	17.14

delta (δ)	face-centered cubic	15.92

delta prime (δ′)	body-centered tetragonal	16.00

epsilon (ε)	body-centered cubic	16.51

Sentence(s)

Densities of the different allotropes vary from 16.00 g/cm³ to 19.86 g/cm³.

final_sentence: Densities of the different allotropes vary from 16.00 g/cm³ to 19.86 g/cm³.