Ammonium vanadium sulfate | SSHADE

Solid phase

Official name: Ammonium vanadium sulfate

Name and identifiers

Secondary names: Ammonium vanadium(III) sulfate; Azanium;vanadium;disulfate; Vanadium-ammonium alum
CAS number: 22723-49-5

Family: ionic solid
Class: mixed salt
Compound type: sulfate
Comments: there is a cubic dodecahydrate phase (1.69g/cm3) melting at 45°C

Chemical composition

Formula: $[NH_4]^+[V]^{3+} \cdot (SO_4)^{2-}_2$
Chemical formula: NH4V.(SO4)2
Elemental formula: (N+) H4 (V3+) S2 O4 (O-)4
Isotope mixture type: terrestrial abundance

8.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$NH_4^+$	Ammonium ion	molecule	1	0.25	1	molecular ion	main
	$V^{3+}$	Vanadium(III) cation	element	1	0.25	1	constituent cation	main
	$SO_4^{2-}$	Sulfate ion	molecule	2	0.5	1	molecular ion	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$H_4 >\mid N^+$	1
	$(SO_4)^{2-}$	2

Chemical bonds

	Bond	Number
	$>\mid N^+ \cdot O^{-}-$	2
	$\cdot (\cdot) V^{3+} \cdot O^{-}-$	2
	$\geq N^+-H$	4
	$-\gg S-O^{-}$	2
	$\geqq S=O$	2
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Class: mixed salts (08)
Type: double mixed salts (08.02)

Crystallography

Phase type: crystalline
Crystal system: unknown

Physical properties

Molar mass: 261.103 $g/mol$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid decomposition		> 300°C (> 573 K)

Optical properties

Pure color: dark-red
Color: dark-red, dark-violet, black
Diaphaneity: opaque

Links and Publications

Links