Tobermorite(14A)

Formula : Ca5Si6H21O27.5

Space group: 
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: C 2221
Dana class: 
72.3.2.1 (72) Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings (72.3) with 3-, 4-, or 5- membered rings and 8-membered rings (72.3.2) Tobermorite group (5- 8-membered rings)
High temperature: 
Described with the cement phases the stability of Tobermorite at low temperature cannot be dismissed.
Geological context: 
Known as a hydrothermal alteration product of calcium carbonate rocks, due to contact metamorphism and metasomatism. Filling vesicles and cavities in basaltic rocks.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
T(°C) 0 25 60 100 150 200 250 300
log10K 67.48 62.94 57.48 52.54 47.86 44.30 41.40 38.77