Montroydite | SSHADE

Processing math: 100%

Mineral phase

IMA name: Montroydite

Name and identifiers

IMA Code: Mtyd

Class: non-silicate mineral
Compound type: oxide

Chemical composition

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

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

Chemical functions and bonds

Chemical bonds

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

Oxides composition

Oxides

Formula	$HgO$
Mass fraction (%)	100.0

Classifications

Strunz

Class: oxides - hydroxides - arsenites (04)
Division: metal:oxygen = 2.1 and 1:1 (04.A)
Family: M:O = 1:1 and up to 1:1.25 with large cations (+/- smaller ones) (04.AC)
Code: 04.AC.15

Dana

Major class: oxides and hydroxides (III)
Class: simple oxides (04)
Type: with a cation charge of 2+ (A++O) (04.02)
Group: -Montroydite- group (04.02.06)
Code: 04.02.06.01

Crystallography

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

Physical properties

Molar mass: 216.59 $g/mol$
Density: 11.2 $g/cm^3$

Thermodynamical properties

State NTP: solid

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.280
Refraction index $n_{\alpha}$: 2.37
Refraction index $n_{\beta}$: 2.50
Refraction index $n_{\gamma}$: 2.65
Pure color: red
Color: , brownish red, brown
Diaphaneity: transparent to translucent
Luster: adamantine

Links and Publications

Links