Solid phase
Official name
Cobalt(II) sulfate hydrates
Secondary names
Cobalt sulphate hydrates
Family
ionic solid
Class
normal salt
Compound type
sulfate
Formula
Fe2+SO42n(H2O)
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
Co2+ Cobaltous cation element 1 0.16666666666666666 1 constituent cation main
(SO4)2 Sulfate anion chemical function 1 0.16666666666666666 1 anionic radical main
H2O Water molecule 1 - 7 0.6666666666666666 ± 0.5 1 hydration main
Chemical functions
  Function Number
(SO4)2 1
ROH 2
Chemical bonds
  Bond Number
Co2+O 2
OH n
OH 2
SO1/2 4
Class
normal salts (07)
Type
hydrated simple normal salts (07.04)
Group
sulfate (07.01.09)
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/cm3
State NTP
solid
Refringence type
biaxial
Refraction index nα
1.639 - 1.483
Pure color
various
Color
reddish, pink
Diaphaneity
various
Luster
various