Mercury(II) oxide | SSHADE

Processing math: 100%

Solid phase

Official name: Mercury(II) oxide

Name and identifiers

Secondary names: Mercuric oxide
CAS number: 21908-53-2

Family: covalent network solid
Class: chain covalent network solid
Compound type: oxide

Chemical composition

Formula: $HgO$
Chemical formula: HgO
Elemental formula: Hg O
Isotope mixture type: terrestrial abundance

4.0

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

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$-Hg-O-$	2
	$-Hg-Hg-$	2

Class: tridimensional covalent networks (11)
Type: one metal and one non-metal (or metalloid) tridimensional networks (11.04)

Associated phases

Equivalent mineral: Montroydite

Crystallography

Phase type: crystalline
Crystal system: orthorhombic
Crystal class: dipyramidal
Crystal class symbol: mmm (D2h)
Crystal spacegroup: Pnma

Physical properties

Molar mass: 216.591 $g/mol$
Density: 11.14 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid decomposition		500°C (773 K)

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.28
Refraction index $n_{\alpha}$: 2.37
Refraction index $n_{\beta}$: 2.50
Refraction index $n_{\gamma}$: 2.65
Dispersion V: relatively strong
Pure color: red
Color: deep red, orange, brownish red to brown
Diaphaneity: transparent to translucent
Luster: adamantine

Links and Publications

Links