Constituent
- Name
- Blodite
- IMA name
- Blodite
- Class
- non-silicate mineral
- Compound type
- sulfate
- Relevance
- main - minor
- Arrangement
- in multi-phases
- Mass fraction
- 0.03 $\pm$ 0.1
- Formula
- $Na_2Mg(SO_4)_2 \bullet 4(H_2O)$
- Chemical formula
- Na2Mg(SO4)2•4(H2O)
- Elemental formula
- (Na+)2 Mg S2 O8 (O-)4 H8
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $Na_{2}O$ $MgO$ $H_{2}O$ $SO_{3}$ Mass fraction (%) 18.53 12.05 21.54 47.87
Strunz
- Class
- sulfates - chromates - molybdates - tungstates (07)
- Division
- sulfates (selenates, etc.) without additional anions, with H2O (07.C)
- Family
- with medium-sized and large cations (07.CC)
- Code
- 07.CC.50
Dana
- Major class
- sulfates, chromates, selenates (VI)
- Class
- hydrated acid and sulfates (29)
- Type
- where (A+)2B(XO4)2.x(H2O) (29.03)
- Group
- Blodite group (29.03.03)
- Code
- 29.03.03.01
- Phase type
- crystalline
- Crystal system
- monoclinic
- Crystal class
- prismatic
- Crystal class symbol
- 2/m (C2h)
- Crystal spacegroup
- P2(1)/c
- Molar mass
- 334.47 $g/mol$
- Density
- 2.23 $g/cm^3$
- Refringence type
- biaxial
- Refringence sign
- negative
- Birefringence
- 0.004
- Refraction index $n_{\alpha}$
- 1.483
- Refraction index $n_{\beta}$
- 1.486
- Refraction index $n_{\gamma}$
- 1.487
- Dispersion V
- relatively strong
- Color
- colorless, green, yellow, red
- Diaphaneity
- transparent to translucent