Constituent
Name
Ammonium aluminium sulfate dodecahydrate (phase FE)
Official name
Ammonium aluminium sulfate dodecahydrate (phase FE)
Family
ionic solid
Class
normal salt
Compound type
sulfate
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass
0.232 $\pm$ 0.002 $g$
Mass fraction
1.0
Mole fraction
1.0
Chemical composition
Formula
$(NH_4^+)Al^{3+} \cdot (SO_4^{2-})_2 \bullet 12(H_2O)$
Chemical formula
(NH4)Al(SO4)2.12H2O
Elemental formula
(N+) H28 (Al3+) S2 O16 (O-)4
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$NH_4^+$ Ammonium ion molecule 1 0.0625 1 constituent cation main
$Al^{3+}$ Aluminium(III) cation element 1 0.0625 1 constituent cation main
$SO_4^{2-}$ Sulfate ion molecule 2 0.125 1 constituent anion main
$H_2O$ Water molecule 12 0.75 1 hydration main
Chemical functions
  Function Number Relevance
$H_4 >\mid N^+$ 2
$(SO_4)^{2-}$ 2
$R-OH$ 2 main
Chemical bonds
  Bond Number Relevance
$>\mid N^+ \cdot O^{-}-$ 1
$\cdot (\cdot) Al^{3+} \cdot O^{-}-$ 3
$\geq N^+-H$ 4 main
$-\gg S-O^{-}$ 2 main
$\geqq S=O$ 2 main
$-O-H$ 2 main
$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$ 4
Class
normal salts (07)
Type
hydrated simple normal salts (07.04)
Phase name
FE-NH4Al(SO4)2.12H2O
Phase type
crystalline
Crystal system
unknown
Crystal class
unknown
Crystal class symbol
unknown
Crystal spacegroup
unknown
Comments
paraelectric phase
Texture
unknown
Molar mass
453.33 $g/mol$
Color
colorless, white
Diaphaneity
transparent to translucent