Oxovanadium(2+) sulfate pentahydrate | SSHADE

Solid phase

Official name: Oxovanadium(2+) sulfate pentahydrate

Name and identifiers

Secondary names: Vanadyl sulfate pentahydrate; Oxosulfatovanadium pentahydrate; Vanadium, oxosulfato-, pentahydrate; vanadic sulfate pentahydrate
CAS number: 12439-96-2

Family: ionic solid
Class: alkali salt
Compound type: sulfate
Comments: also exists as anhydrate (Pauflerite), trihydrate (Bobjonesite) and hexahydrate (Stanleyite)

Chemical composition

Formula: $VOSO_4 \bullet 5(H_2O)$
Chemical formula: VOSO4•5H2O
Elemental formula: (V2+) O8 S (O-)2 H10
Isotope mixture type: terrestrial abundance

16.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$V^{2+}$	Vanadium(II) cation	element	1	0.125	1	constituent cation	main
	$O$	Oxygen	element	1	0.125	1	constituent element	main
	$SO_4^{2-}$	Sulfate ion	molecule	1	0.125	1	molecular ion	main
	$H_2O$	Water	molecule	5	0.625	1	hydration	main

Composition comments: one H2O molecule is not bonded with the V ion

Chemical functions and bonds

Chemical functions

	Function	Number
	$(SO_4)^{2-}$	2
	$R-OH$	2

Chemical bonds

	Bond	Number
	$V-O$	4
	$\cdot (cdot) V^{2+}=O$	1
	$\cdot V^{2+} \cdot O^{-}-$	1
	$-\gg S-O^{-}$	2
	$\geqq S=O$	2
	$-O-H$	2
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Class: alkali salts (06)
Type: simple alkali salts (06.01)

Crystallography

Phase type: crystalline
Crystal system: unknown

Physical properties

Molar mass: 253.07 $g/mol$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid decomposition		> 105°C (> 378 K)
solid-solid	hexahydrate $VOSO_4(H_2O)_6$	< 13.6 °C (< 286.8 K)

Optical properties

Pure color: blue
Color: blue

Links and Publications

Links