Molybdenum trioxide | SSHADE

Solid phase

Official name: Molybdenum trioxide

Name and identifiers

Secondary names: Molybdic anhydride; Molybdite; Molybdic trioxide; Molybdenum(VI) oxide; trioxomolybdenum
CAS number: 1313-27-5

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

Chemical composition

Formula: $MoO_3$
Chemical formula: MoO3
Elemental formula: Mo O3
Isotope mixture type: terrestrial abundance

8.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Mo$	Molybdenum	element	1	0.25	1	constituent element	main
	$O$	Oxygen	element	3	0.75	1	constituent element	main

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$\geq \mid Mo-O-$	6

Class: sheet covalent networks (10)
Type: one metal and one non-metal atoms sheet networks (10.04)

Associated phases

Equivalent mineral: Molybdite

Crystallography

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

Physical properties

Molar mass: 143.95 $g/mol$
Density: 4.70 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid	liquid MoO3	> 802°C (> 1075 K)

Optical properties

Refringence type: biaxial
Refringence sign: unknown
Refraction index $n_{\alpha}$: 2.12 - 2.13
Pure color: colorless
Color: colorless, white, yellow (high T), light blue, light green
Diaphaneity: transparent
Luster: adamantine

Links and Publications

Links