Constituent
- Name
- Thermonatrite
- IMA name
- Thermonatrite
- Class
- non-silicate mineral
- Compound type
- carbonate
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0 $\pm$ 0.005
- Abundance comments
- sum of [Ca, K, Mg] < 0.04%
- Formula
- $Na_2CO_3 \bullet (H_2O)$
- Chemical formula
- Na2CO3•(H2O)
- Elemental formula
- Na2 C O4 H2
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $Na_{2}O$ $CO_{2}$ $H_{2}O$ Mass fraction (%) 49.98 35.49 14.53
Strunz
- Class
- carbonates - nitrates (05)
- Division
- carbonates without additional anions, with H2O (05.C)
- Family
- with large cations (alkali and alkali-earth carbonates) (05.CB)
- Code
- 05.CB.05
Dana
- Major class
- carbonates, nitrates, borates (V)
- Class
- hydrated carbonates (15)
- Type
- where A+(XO3)·x(H2O) (15.01)
- Group
- -Thermonatrite- group (15.01.01)
- Code
- 15.01.01.01
- Phase type
- crystalline
- Crystal system
- orthorhombic
- Crystal class
- dipyramidal
- Crystal class symbol
- mmm (D2h)
- Crystal spacegroup
- Pmmm
- Comments
- also class pyramidal mm2 (C2v), space group Pca21
- Molar mass
- 124.00 $g/mol$
- Density
- 2.255 $g/cm^3$
- Refringence type
- biaxial
- Refringence sign
- negative
- Birefringence
- 0.104
- Refraction index $n_{\alpha}$
- 1.420
- Refraction index $n_{\beta}$
- 1.506
- Refraction index $n_{\gamma}$
- 1.524
- Dispersion V
- relatively strong
- Color
- colorless, white, gray, yellow
- Diaphaneity
- transparent
- Luster
- vitreous