Cobalt(II) phosphate tetrahydrate | SSHADE

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Solid phase

Official name: Cobalt(II) phosphate tetrahydrate

Name and identifiers

Secondary names: Cobaltous phosphate tetrahydrate; cobalt(2+);diphosphate tetrahydrate; Tricobalt bis(orthophosphate) tetrahydrate

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 and bonds

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)

Crystallography

Phase type: crystalline
Crystal system: monoclinic
Comments: consists of discrete $[Co(OH_2)6]^{2+} and [NO_3]^−$ ions

Physical properties

Molar mass: 438.80 $g/mol$
Density: 2.6 $g/cm^3$

Thermodynamical properties

State NTP: solid

Optical properties

Pure color: pale violet

Links and Publications

Links

Wikipedia webpage