Solid phase
Official name
Zirconium(IV) sulfate hydrates
Secondary names
Zirconium sulfate hydrates; Zirconium sulphate hydrates; Zirconium disulfate hydrates; Zirconium orthosulfate hydrates; Sulfuric acid, zirconium(4+) salt (2:1)
CAS number
34806-73-0
Type
Family
ionic solid
Class
normal salt
Compound type
sulfate
Comments
There are at least 7 phases: $\alpha$, $\beta$ and $\gamma-$Zr(SO_4)_2.H_2O$, $Zr(SO_4)_2.4H_2O$, $\alpha-Zr(SO_4)_2.5H_2O$, $\beta-Zr(SO_4)_2.5H_2O$, $Zr(SO_4)_2.7H_2O$.
Chemical composition
Formula
$Zr^{4+} \cdot ((SO_4)^{2-})_2 \bullet n(H_2O)$
Chemical formula
Zr(SO4)2•n(H2O)
Elemental formula
(Zr4+) S2 (O)5-11 (O-)4 (H)2-14
Isotope mixture type
terrestrial abundance
14.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Zr^{4+}$ Zirconium(IV) cation element 1 0.14285714285714285 1 constituent cation main
$(SO_4)^{2-}$ Sulfate anion chemical function 2 0.2857142857142857 1 anionic radical main
$H_2O$ Water molecule 1 - 7 0.5714285714285714 $\pm$ 0.42857142857142855 1 hydration main
Chemical functions
  Function Number
$(SO_4)^{2-}$ 2
$R-OH$ 2
Chemical bonds
  Bond Number
$\cdot (\cdot) (\cdot) Zr^{4+} \cdot O^{-}-$ 4
$-O \dots H-$
$-O-H$ 2
$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$ 4
Class
normal salts (07)
Type
hydrated simple normal salts (07.04)
Endmembers
Phase type
crystalline
Crystal system
various
Crystal class
various
Crystal class symbol
various
Crystal spacegroup
various
Comments
There are at least 7 phases: $\alpha$, $\beta$ and $\gamma-$Zr(SO_4)_2.H_2O$, $Zr(SO_4)_2.4H_2O$, $\alpha-Zr(SO_4)_2.5H_2O$, $\beta-Zr(SO_4)_2.5H_2O$, $Zr(SO_4)_2.7H_2O$.
Molar mass
301.36 (monohydrate) - 409.45 (heptahydrate) $g/mol$
Density
2.85 (tetrahydrate) - 2.55 (beta-pentahydrate) $g/cm^3$
State NTP
solid
Phase transitions comments
Phase transitions described in Bear and Mumme, 1969, Acta Cryst., B25, 1572
Refringence type
various
Pure color
colorless
Color
colorless, white
Diaphaneity
various
Luster
various
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