Constituent
Name
Calcite
Class
non-silicate mineral
Compound type
carbonate
Comments
Unknown mass fraction of Calcite: formed by transformation of Portlandite
Arrangement
homogeneous in multi-phases
Formula
$CaCO_3$
Chemical formula
CaCO3
Elemental formula
O3 Ca C
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$C$ Carbon element 1.0 constituent element main
$Ca$ Calcium element 1.0 constituent element main
$O$ Oxygen element 3.0 constituent element main
Chemical functions
  Function Number
$\bullet(CO_3)^{2-}$ 1
Chemical bonds
  Bond Number
$>C=O$ 1
$\eqslantgtr C-O^-$ 2
Oxides
Formula CO2 CaO
Mass fraction 43.97 56.03

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
hexagonal-scalenohedral
Crystal class symbol
-3m (D3d)
Crystal spacegroup
R-3c
Texture
unknown
Molar mass
100.09 $g/mol$
Density
2.71 $g/cm^3$
Refringence type
uniaxial
Refringence sign
negatif
Birefringence
0.154 - 0.174
Refraction index $n_{\alpha}$
1.486
Refraction index $n_{\beta}$
1.486
Refraction index $n_{\gamma}$
1.64 - 1.66
Color
colorless, white, pink, yellow, brown
Diaphaneity
transparent to translucent
Luster
vitreous