Secondary names

Cobalt(II) sulphate heptahydrate; Chalcanthum; Blue vitriol

CAS number

10026-24-1

18.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Co^{2+}$	Cobaltous cation	element	1	0.1111111111111111	1	constituent cation	main
	$(SO_4)^{2-}$	Sulfate anion	chemical function	1	0.1111111111111111	1	anionic radical	main
	$H_2O$	Water	molecule	7	0.7777777777777778	1	hydration	main

Chemical functions

	Function	Number
	$(SO_4)^{2-}$	1
	$R-OH$	2

Chemical bonds

	Bond	Number
	$\cdot Co^{2+} \cdot O^{-}-$	2
	$-O \dots H-$	7
	$-O-H$	2
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Class

normal salts (07)

Type

hydrated simple normal salts (07.04)

Group

sulfate (07.01.09)

Phase type

crystalline

Crystal system

monoclinic

Crystal class

prismatic

Crystal class symbol

2/m (C2h)

Crystal spacegroup

P2(1)/c

Refringence type

biaxial

Refringence sign

unknown

Refraction index $n_{\alpha}$

1.483

Color

Red

Links

• Wikipedia: Cobalt(II) Sulfate