Mineral phase
IMA name
Calcite group
Class
non-silicate mineral
Compound type
carbonate
Formula
(Ca,Mg,Fe,Mn,Ni,Co,Zn,Cd)CO3
Chemical formula
(Ca,Mg,Fe,Mn,Ni,Co,Zn,Cd)CO3
Elemental formula
(Mg2+)0-1 (Ca2+)0-1 (Fe2+)0-1 (Mn2+)0-1 (Co2+)0-1 (Zn2+)0-1 (Cd2+)0-1 (Ni2+)0-0.6 C O (O-)2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
Mg2+ Magnesium(II) cation element 0 - 1 constituent cation main
Ca2+ Calcium cation element 0 - 1 constituent cation main
Fe2+ Iron(II) cation element 0 - 1 constituent cation main
Mn2+ Manganese(II) cation element 0 - 1 constituent cation main
Co2+ Cobaltous cation element 0 - 1 constituent cation main
Zn2+ Zinc(II) cation element 0 - 1 constituent cation main
Cd2+ Cadmium cation element 0 - 1 constituent cation main
Ni2+ Nickel cation element 0 - 0.6 constituent cation main
(CO3)2 Carbonate anion chemical function 1 anionic radical main
Chemical functions
  Function Number
(CO3)2 1
Chemical bonds
  Bond Number
CO2/3 3
Oxides
Formula CaO CO2 MgO FeO MnO CoO ZnO CdO NiO
Mass fraction (%)

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)
Phase type
crystalline
Crystal system
trigonal
Crystal class
ditrigonal-scalenohedral
Crystal class symbol
-3m (D3d)
Crystal spacegroup
R-3c
Molar mass
84.31 - 172.42 g/mol
Density
2.71 - 5.03 g/cm3
State NTP
solid
Refringence type
uniaxial
Refringence sign
negative
Birefringence
0.172 - 0.255
Refraction index no (w)
1.658 - 1.875
Refraction index ne (e)
1.486 - 1.633
Pure color
colorless, yellow, pink, light green
Color
colorless, white, pink, reddish, reddish white, pinkish red, red, rose red, purple, blue, bluish grey, yellow, green to apple-green, yellowish brown, yellowish gray, brown, gray, gray brown, greenish gray, black,
Diaphaneity
transparent to subtranslucent
Luster
vitreous