Constituent
- Name
- Mg-Siderite
- IMA name
- Magnesite-Siderite series
- Class
- non-silicate mineral
- Compound type
- carbonate
- Comments
- full miscibility of the solid solution
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0
- Formula
- Fe2+0.66Mg2+0.305Mn2+0.025CO3
- Chemical formula
- (Fe0.66,Mg0.305,Mn0.025)CO3
- Elemental formula
- (Mg2+)0.306 (Fe2+)0.662 (Mn2+)0.024 (Ca2+)0.008 C O (O-)2
- Isotope mixture type
- terrestrial abundance
- Composition comments
- Mg+Fe=1
- Oxides
-
Formula MgO FeO CO2 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
- 105.2 g/mol
- Density
- 3.635 g/cm3
- Refringence type
- uniaxial
- Refringence sign
- negative
- Birefringence
- 0.225
- Refraction index nα
- 1.815
- Refraction index nβ
- 1.59
- Dispersion V
- very strong to strong
- Color
- yellow-green
- Diaphaneity
- transparent to subtranslucent
- Luster
- vitreous