Constituent
- Name
- Glauberite
- IMA name
- Glauberite
- Class
- non-silicate mineral
- Compound type
- sulfate
- Relevance
- main - major
- Arrangement
- in multi-phases
- Mass fraction
- 0.46 $\pm$ 0.1
- Formula
- $Na_2Ca(SO_4)_2$
- Chemical formula
- Na2Ca(SO4)2
- Elemental formula
- (Na+)2 (Ca2+) S2 O4 (O-)4
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $Na_{2}O$ $CaO$ $SO_{3}$ Mass fraction (%) 22.28 20.16 57.56
Strunz
- Class
- sulfates - chromates - molybdates - tungstates (07)
- Division
- sulfates (selenates, etc.) without additional anions, without H2O (07.A)
- Family
- with only large cations (07.AD)
- Code
- 07.AD.25
Dana
- Major class
- sulfates, chromates, selenates (VI)
- Class
- anhydrous acid and sulfates (28)
- Type
- with miscellaneous formulae (28.04)
- Group
- -Glauberite- group (28.04.02)
- Code
- 28.04.02.01
- Phase type
- crystalline
- Crystal system
- monoclinic
- Crystal class
- prismatic
- Crystal class symbol
- 2/m (C2h)
- Crystal spacegroup
- C2/c
- Molar mass
- 278.18 $g/mol$
- Density
- 2.7 - 2.85 $g/cm^3$
- Refringence type
- biaxial
- Refringence sign
- negative
- Birefringence
- 0.021 - 0.022
- Refraction index $n_{\alpha}$
- 1.507 - 1.515
- Refraction index $n_{\beta}$
- 1.527 - 1.535
- Refraction index $n_{\gamma}$
- 1.529 - 1.536
- Dispersion V
- strong, r > v
- Color
- colorless, gray, gray white, yellow, yellowish white
- Diaphaneity
- transparent to translucent
- Luster
- vitreous