As(element)

Formula : As

Family: 
Space group: 
Trigonal - Hexagonal Scalenohedral HM symbol (-3 2/m) Space Group: R 3m
Dana class: 
1.3.1.1I - 1 Native Elements ; 1.3 Native Elements with semi-metallic and non-metallic elements ; 1.3.1 Arsenic group
High temperature: 
Low and high temperature stability.
Geological context: 
Hydrothermal and sedimentary to igneous mineral.

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
74.922 12.960 0 0 35.690 24.66
Reaction properties

As(element) + 1.5H2O ⇌ AsH3 + 0.75O2

298.15 K, 1 bar log10K: -81.94 ΔH°r: -465737 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -89.71 -81.94 -72.90 -64.53 -56.18 -49.48 -43.97 -39.31