Constituent Calcite | SSHADE

Constituent

Name: Calcite
IMA name: Calcite

Class: non-silicate mineral
Compound type: carbonate

Chemical composition

Formula: CaCO₃
Chemical formula: CaCO3
Elemental formula: (Ca2+) C O (O-)2
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	Ca²⁺	Calcium cation	element	1		constituent cation	main
	(CO₃)^2-	Carbonate anion	chemical function	1		anionic radical	main

Chemical functions and bonds

Chemical functions

	Function	Number
	(CO₃)^2-	1

Chemical bonds

	Bond	Number
	· Ca²⁺ · O^--	2
	……C…O^-2/3	3

Oxides composition

Oxides

Formula	CaO	CO₂
Mass fraction (%)	56.03	43.97

Classifications

Strunz

Class: carbonates - nitrates (05)
Division: carbonates without additional anions, without H2O (05.A)
Family: Alkali-earth (and other M2+) carbonates (05.AB)
Code: 05.AB.05

Dana

Major class: carbonates, nitrates, borates (V)
Class: anhydrous carbonates (14)
Type: with simple formula A+CO3 (14.01)
Group: Calcite group (Trigonal: R-3c) (14.01.01)
Code: 14.01.01.01

Phase type: crystalline

Crystallography

Crystal system: trigonal
Crystal class: ditrigonal-scalenohedral
Crystal class symbol: -3m (D3d)
Crystal spacegroup: R-3c

Physical properties

Molar mass: 100.09 g/mol
Density: 2.71 g/cm³

Optical properties

Refringence type: uniaxial
Refringence sign: negative
Birefringence: 0.172
Refraction index n_α: 1.658
Refraction index n_β: 1.486
Color: colorless, white, pink, yellow, brown
Diaphaneity: transparent to translucent
Luster: vitreous