Constituent
Name
Calcite
IMA name
Calcite
Class
non-silicate mineral
Compound type
carbonate
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Chemical composition
Formula
$CaCO_3$
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
$Ca^{2+}$ Calcium cation element 1 constituent cation main
$(CO_3)^{2-}$ Carbonate anion chemical function 1 anionic radical main
Composition comments
probably very pure calcite (no Fe, no or little Mg ?) as witnessed by VNIR spectra, but not yet elemental analysis performed.
Chemical functions
  Function Number
$(CO_3)^{2-}$ 1
Chemical bonds
  Bond Number
$\cdot Ca^{2+} \cdot O^{-}-$ 2
$\dddot - \dddot - C \dddot - O^{-2/3}$ 3
Oxides
Formula $CaO$ $CO_{2}$
Mass fraction (%) 56.03 43.97

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
Crystal system
trigonal
Crystal class
ditrigonal-scalenohedral
Crystal class symbol
-3m (D3d)
Crystal spacegroup
R-3c
Molar mass
100.09 $g/mol$
Density
2.71 $g/cm^3$
Refringence type
uniaxial
Refringence sign
negative
Birefringence
0.172
Refraction index $n_{\alpha}$
1.658
Refraction index $n_{\beta}$
1.486
Color
colorless, white, pink, yellow, brown
Diaphaneity
transparent to translucent
Luster
vitreous