Solid phase
Official name
Cobalt(II) sulfate hydrates
Secondary names
Cobalt sulphate hydrates
Type
Family
ionic solid
Class
normal salt
Compound type
sulfate
Chemical composition
Formula
$Fe^{2+} \cdot SO_4^{2-} \bullet n(H_2O)$
Chemical formula
CoSO4•n(H2O)
Elemental formula
(Co2+) S (O)3-9 (O-)2 (H)2-14
Isotope mixture type
terrestrial abundance
12.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Co^{2+}$ Cobaltous cation element 1 0.16666666666666666 1 constituent cation main
$(SO_4)^{2-}$ Sulfate anion chemical function 1 0.16666666666666666 1 anionic radical main
$H_2O$ Water molecule 1 - 7 0.6666666666666666 $\pm$ 0.5 1 hydration main
Chemical functions
  Function Number
$(SO_4)^{2-}$ 1
$R-OH$ 2
Chemical bonds
  Bond Number
$\cdot Co^{2+} \cdot O^{-}-$ 2
$-O \dots H-$ n
$-O-H$ 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)
Endmembers
Phase type
crystalline
Crystal system
various
Crystal class
various
Crystal class symbol
various
Crystal spacegroup
various
Molar mass
173.01 - 281.103 $g/mol$
Density
3.075 - 1.948 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refraction index $n_{\alpha}$
1.639 - 1.483
Pure color
various
Color
reddish, pink
Diaphaneity
various
Luster
various
Links