Mineral phase
IMA name
Mirabilite
Type
Class
non-silicate mineral
Compound type
sulfate
Chemical composition
Formula
$Na_2(SO_4) \bullet 10(H_2O)$
Chemical formula
Na2SO4.10(H2O)
Elemental formula
Na2 S O14 H20
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Na$ Sodium element 2 constituent element main
$S$ Sulfur element 1 constituent element main
$O$ Oxygen element 14 constituent element main
$H$ Hydrogen element 20 constituent element main
Chemical functions
  Function Number
$(SO_4)^{2-}$ 1
Chemical bonds
  Bond Number
$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$ 4
Oxides
Formula $Na_{2}O$ $SO_{3}$ $H_{2}O$
Mass fraction (%) 19.24 24.85 55.91

Strunz

Class
sulfates - chromates - molybdates - tungstates (07)
Division
sulfates (selenates, etc.) without additional anions, with H2O (07.C)
Family
with only large cations (07.CD)
Code
07.CD.10

Dana

Major class
sulfates, chromates, selenates (VI)
Class
hydrated acid and sulfates (29)
Type
where (A+)2XO4.x(H2O) (29.02)
Group
-Mirabilite- group (29.02.02)
Code
29.02.02.01
Phase type
crystalline
Crystal system
monoclinic
Crystal class
prismatic
Crystal class symbol
2/m (C2h)
Crystal spacegroup
P2(1)/m
Molar mass
322.20 $g/mol$
Density
1.49 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.023
Refraction index $n_{\alpha}$
1.396
Refraction index $n_{\beta}$
1.4103
Refraction index $n_{\gamma}$
1.419
Pure color
colorless
Color
Colorless, White, Yellowish white, Greenish white
Diaphaneity
transparent to opaque
Luster
vitreous
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