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
- Formula
- $CaCO_3$
- Chemical formula
- CaCO3
- Elemental formula
- Ca C O3
- Isotope mixture type
- terrestrial abundance
- 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.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 $g/mol$
- Density
- 2.93 $g/cm^3$
- Refringence type
- biaxial
- Refringence sign
- negative
- Birefringence
- 0.156
- Refraction index $n_{\alpha}$
- 1.529 - 1.53
- Refraction index $n_{\beta}$
- 1.68 - 1.682
- Refraction index $n_{\gamma}$
- 1.685-1.686
- Color
- colorless, white, grey, yellow
- Diaphaneity
- transparent to translucent
- Luster
- vitreous