Gehlenite

Formula : Ca2(Al2Si)O7

Family: 
Space group: 
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: P 421m
Dana class: 
55.4.1.2 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions (55.4) with cations in [8] and lower coordination (55.4.1) Melilite group
High temperature: 
High temperature mineral from around 780C to 1600C
Geological context: 
Contact metamorphic mineral in limestone. Skarns along the contact of a diorite intrusion . Mineral also found in metallurgical slags and incineration byproducts from municipal solid waste (bottom ash, fly ash).

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

T(°C) 0 25 60 100 150 200 250 300
log10K 63.10 55.24 46.09 37.66 29.21 22.32 16.39 11.02