Solid phase
Official name
Cobalt(II) phosphate tetrahydrate
Secondary names
Cobaltous phosphate tetrahydrate; cobalt(2+);diphosphate tetrahydrate; Tricobalt bis(orthophosphate) tetrahydrate
Type
Family
ionic solid
Class
normal salt
Compound type
phosphate
Chemical composition
Formula
$(Co^{2+})_3.(PO_4^{3-})_2 \bullet 4H_2O$
Chemical formula
Co3(PO4)2.4H2O
Elemental formula
(Co2+)3 P2 O6 (O-)6 H8
Isotope mixture type
terrestrial abundance
18.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Co^{2+}$ Cobaltous cation element 3 0.3333333333333333 1 constituent cation main
$(PO_4)^{3-}$ Phosphate anion chemical function 2 0.2222222222222222 1 anionic radical main
$H_2O$ Water molecule 4 0.4444444444444444 1 hydration main
Chemical functions
  Function Number
$(PO_4)^{3-}$ 2
$R-OH$ 2
Chemical bonds
  Bond Number
$\cdot Co^{2+} \cdot O^{-}-$ 3
$-O-H$ 2
$\dddot - \dddot - \dddot - P \dddot - O^{-3/4}$ 4
Class
normal salts (07)
Type
hydrated simple normal salts (07.04)
Phase type
crystalline
Crystal system
monoclinic
Comments
consists of discrete $[Co(OH_2)6]^{2+} and [NO_3]^−$ ions
Molar mass
438.80 $g/mol$
Density
2.6 $g/cm^3$
State NTP
solid
Pure color
pale violet
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