Constituent Natrite (sodium carbonate anhydrous) | SSHADE

Constituent

Name: Natrite (sodium carbonate anhydrous)
IMA name: Natrite

Class: non-silicate mineral
Compound type: carbonate
Comments: Equivalent Space Group: Pmcn (62)

Constituent abundance in material

Relevance: main - major
Arrangement: single phase
Mass fraction: 1.0 $\pm$ 0.005
Abundance comments: less than 1% $H_2O$ , sum of [Ca, K, Mg] < 0.04%

Chemical composition

Formula: $Na_2CO_3$
Chemical formula: Na2CO3
Elemental formula: (Na2+)2 C O (O-)2
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Na^{2+}$	Sodium cation	element	2		constituent cation	main
	$(CO_3)^{2-}$	Carbonate anion	chemical function	1		anionic radical	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$(CO_3)^{2-}$	1

Chemical bonds

	Bond	Number
	$Na^+ \cdot O^{-}-$	2
	$\dddot - \dddot - C \dddot - O^{-2/3}$	3

Oxides composition

Oxides

Formula	$Na_{2}O$	$CO_{2}$
Mass fraction (%)	58.48	41.52

Classifications

Strunz

Class: carbonates - nitrates (05)
Division: carbonates without additional anions, without H2O (05.A)
Family: Alkali carbonates (05.AA)
Code: 05.AA.10

Dana

Major class: carbonates, nitrates, borates (V)
Class: anhydrous carbonates (14)
Type: with simple formula A+CO3 (14.01)
Group: Natrite group (14.01.06)
Code: 14.01.06.01

Phase type: crystalline

Crystallography

Crystal system: monoclinic
Crystal class: prismatic
Crystal class symbol: 2/m (C2h)
Crystal spacegroup: C2/m

Physical properties

Molar mass: 105.99 $g/mol$
Density: 2.54 $g/cm^3$

Optical properties

Refringence type: biaxial
Refringence sign: negative
Birefringence: 0.133
Refraction index $n_{\alpha}$: 1.41
Refraction index $n_{\beta}$: 1.535
Refraction index $n_{\gamma}$: 1.543
Color: Colorless, Yellow orange, White, Pink
Diaphaneity: transparent
Luster: vitreous