Constituent Dolomite | SSHADE

Constituent

Name: Dolomite
IMA name: Dolomite group

Class: non-silicate mineral
Compound type: carbonate
Comments: Other endmembers are: Kutnohorite and Minrecordite

Constituent abundance in material

Relevance: main - major
Arrangement: single phase

Chemical composition

Formula: $Ca(A)(CO_3)_2 \ \ \ \ \$ where $A = Mg,Fe^{2+},Mn$ and/or $Zn$
Chemical formula: Ca(Mg,Fe,Mn,Zn)(CO3)2
Elemental formula: (Ca2+) (Mg2+)0-1 (Zn2+)0-1 (Mn2+)0-1 (Fe2+)0-1 C2 O2 (O-)4
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Ca^{2+}$	Calcium cation	element	1		constituent cation	main
	$Mg^{2+}$	Magnesium(II) cation	element	0 - 1		constituent cation	main
	$Zn^{2+}$	Zinc(II) cation	element	0 - 1		constituent cation	main
	$Mn^{2+}$	Manganese(II) cation	element	0 - 1		constituent cation	main
	$Fe^{2+}$	Iron(II) cation	element	0 - 1		constituent cation	main
	$(CO_3)^{2-}$	Carbonate anion	chemical function	2		anionic radical	main

Chemical functions and bonds

Chemical functions

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

Chemical bonds

	Bond	Number
	$\cdot Ca^{2+} \cdot O^{-}-$	2
	$\cdot Mg^{2+} \cdot O^{-}-$
	$\cdot Fe^{2+} \cdot O^{-}-$
	$\cdot Mn^{2+} \cdot O^{-}-$
	$\cdot Zn^{2+} \cdot O^{-}-$
	$\dddot - \dddot - C \dddot - O^{-2/3}$	3

Oxides composition

Oxides

Formula	$CaO$	$CO_{2}$	$MgO$	$MnO$	$FeO$	$ZnO$
Mass fraction (%)

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.10

Dana

Major class: carbonates, nitrates, borates (V)
Class: anhydrous carbonates (14)
Type: with compound formula A+B++(CO3)2 (14.02)
Group: Dolomite group (Trigonal: R-3) (14.02.01)

Phase type: crystalline

Crystallography

Crystal system: trigonal
Crystal class: rhombohedral
Crystal class symbol: -3 (S6)
Crystal spacegroup: R-3

Physical properties

Molar mass: 184.4-225.49 $g/mol$
Density: 2.8 - 3.45 $g/cm^3$

Optical properties

Refringence type: uniaxial
Refringence sign: negative
Diaphaneity: transparent to subtranslucent
Luster: various