Fluorite

Formula : CaF2

Space group: 
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Dana class: 
9.2.1.1 (9) Anhydrous and Hydrated Halides (9.2) where A (X)2 (9.2.1) Dana Group
High temperature: 
Fluorite is stable at low temperature but not at room temperature.
Geological context: 
Occurs widespread as common mineral in hydrothermal ore deposits; in cavities in sedimentary rocks; as hot spring deposit; in certain granites.

Dernière mise à jour le 11.06.2018

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
J·mol-1
ΔHºf
J·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
78.075 24.542 -1175844 -1228260 68.576 71.12
Reaction properties

Fluorite ⇌ Ca+2 + 2F-

298.15 K, 1 bar log10K: -10.51 ΔH°r: 14560 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -10.82 -10.51 -10.33 -10.35 -10.62 -11.12 -11.90 -13.07