S(beta)

Formula : S

Family: 
Space group: 
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: F ddd
Dana class: 
1.3.5.1 (1) Native Elements (1.3) with semi-metallic and non-metallic elements (1.3.5) Sulfur Polymorph group
High temperature: 
Stable between 95C < T < 115C
Geological context: 
Occurs as native metalloid in volcanic exhalations and bacterial reduction of sulfates in sediments (S8). But also in slags as condensates

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
32.066 72 33.022 23.13
Reaction properties

S(beta) + H2O ⇌ HS- + 0.5O2 + H+

298.15 K, 1 bar log10K: -45.13 ΔH°r: J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -49.36 -45.13 -40.31 -35.95 -31.74 -28.52 -26.02 -24.14