Constituent
Name
Aragonite
IMA name
Aragonite
Class
non-silicate mineral
Compound type
carbonate
Comments
Unknown mass fraction of Aragonite: formed by transformation of Portlandite
Equivalent Space Group: Pmcn (62)
Relevance
main - major
Arrangement
homogeneous in multi-phases
Abundance comments
Unknown mass fraction of Aragonite: formed by transformation of Portlandite
Formula
Chemical formula
CaCO3
Elemental formula
Ca C O3
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
Calcium cation element 1 constituent cation main
Carbonate anion chemical function 1 anionic radical main
Chemical functions
  Function Number
1
Chemical bonds
  Bond Number
2
3
Oxides
Formula
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.15

Dana

Major class
carbonates, nitrates, borates (V)
Class
anhydrous carbonates (14)
Type
with simple formula A+CO3 (14.01)
Group
Aragonite group (Orthorhombic: Pmcn) (14.01.03)
Code
14.01.03.01
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pnma
Texture
unknown
Molar mass
100.09
Density
2.93
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.156
Refraction index
1.529 - 1.53
Refraction index
1.68 - 1.682
Refraction index
1.685-1.686
Color
colorless, white, grey, yellow
Diaphaneity
transparent to translucent
Luster
vitreous