Secondary names

Octasulfur; Sulphur

CAS number

10544-50-0

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$S$	Sulfur	element	8		constituent element	main

Chemical bonds

	Bond	Number
	$-S-S-$	8

Oxides

Formula	$S$
Mass fraction (%)	100.0

Strunz

Class

elements (01)

Division

metalloids and nonmetals (01.C)

Family

Sulfur-selenium-iodine (01.CC)

Code

01.CC.05

Dana

Major class

native elements (I)

Class

native elements (01)

Type

with semi-metallic and non-metallic elements (01.03)

Group

Sulfur Polymorph group (01.03.05)

Code

01.03.05.01

Phase name

alpha-sulfur

Phase type

crystalline

Crystal system

orthorhombic

Crystal class

dipyramidal

Crystal class symbol

mmm (D2h)

Crystal spacegroup

Fddd

Refringence type

biaxial

Refringence sign

positive

Birefringence

0.2873

Refraction index $n_{\alpha}$

1.9579

Refraction index $n_{\beta}$

2.0377

Refraction index $n_{\gamma}$

2.2452

Dispersion V

relatively weak

Color

yellow, yellowish brown, yellowish gray, reddish, greenish

Diaphaneity

transparent to translucent

Luster

resinous

Links

• MinDAT: Sulfur
• WebMineral: Sulfur
• Wikipedia: Sulfur