Secondary names

Natrium calcium carbonate; Na-Ca carbonate

IMA Code

Nye

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

Chemical functions

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

Chemical bonds

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

Oxides

Formula	$Na_{2}O$	$CaO$	$CO_{2}$
Mass fraction (%)	30.08	27.21	42.71

Strunz

Class

carbonates - nitrates (05)

Division

carbonates without additional anions, without H2O (05.A)

Family

Alkali and alkali-earth carbonates (05.AC)

Code

05.AC.10

Dana

Major class

carbonates, nitrates, borates (V)

Class

anhydrous carbonates (14)

Type

with Compound Formula A+2B++(CO3)2 (14.03)

Group

-Nyerereite- group (14.03.04)

Code

14.03.04.01

Phase type

crystalline

Crystal system

orthorhombic

Crystal class

dipyramidal

Crystal class symbol

mmm (D2h)

Crystal spacegroup

Pbca

Comments

initialy assumed to have Cmc2(1) space group

Refringence type

biaxial

Refringence sign

negative

Birefringence

0.0230

Refraction index $n_{\alpha}$

1.511

Refraction index $n_{\beta}$

1.533

Refraction index $n_{\gamma}$

1.534

Pure color

colorless

Color

colorless

Diaphaneity

transparent

Links

• MinDAT: Nyerereite
• WebMineral: Nyerereite
• Wikipedia: Nyerereite