Siderite

Formula : FeCO3

Family: 
Space group: 
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Dana class: 
14.1.1.3 (14) Anhydrous Carbonates (14.1) with Simple Formula A++ CO3 (14.1.1) Calcite Group (Trigonal: R3c)
High temperature: 
Siderite is stable in a large range of temperaturesbut in reduced mediums.
Geological context: 
Siderite is a widespread distributed mineral.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Reaction properties

Siderite + H+ ⇌ HCO3- + Fe+2

298.15 K, 1 bar log10K: -0.27 ΔH°r:-27862 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K 0.14 -0.27 -0.83 -1.42 -2.12 -2.82 -3.59 -4.52