Constituent cinnabar | SSHADE

Constituent

Name: cinnabar
Official name: mercury(II) sulfide alpha

Family: covalent network solid
Class: tridimentional covalent network solid
Compound type: non-oxide ceramic

Constituent abundance in material

Relevance: main - major
Arrangement: single phase
Mass fraction: 1.0
Mole fraction: 1.0

Chemical composition

Formula: $\alpha-HgS$
Chemical formula: HgS
Elemental formula: Hg S
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Hg$	Mercury	element	1	0.5	1	constituent element	main
	$S$	Sulfur	element	1	0.5	1	constituent element	main

Class: tridimensional covalent networks (11)
Type: metal homonuclear tridimensional networks (elemental) (11.02)

Phase name: $\alpha-HgS$
Phase type: crystalline

Crystallography

Crystal system: trigonal
Crystal class: trapezohedral
Crystal class symbol: 32 (D3)
Crystal spacegroup: P3(1)21
Comments: There are three $HgS$ crystalline phases: $\alpha-HgS$ , $\beta-HgS$ , $\gamma-HgS$ and an amorphous one $\alpha'-HgS$

Texture: polycrystalline

Physical properties

Molar mass: 232.66 $g/mol$
Density: 8.10 $g/cm^3$

Optical properties

Refringence type: uniaxial
Refringence sign: positive
Birefringence: 0.351
Refraction index $n_{\alpha}$: 2.905
Refraction index $n_{\beta}$: 3.256
Diaphaneity: transparent to translucent
Luster: adamantine