Au(element)

Formula : Au

Family: 
Space group: 
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Dana class: 
1.1.1.1 (1) Native Elements (1.1) with metallic elements other than the platinum group (1.1.1) Gold group
High temperature: 
The richest electrum in silver is the in temperature : from room temperature to around250C.
Geological context: 
Quartz veins and alluvial deposits.Two ways are possible to precipitate gold: i, from the weathering of primary gold trace-bearing minerals; ii, as electrum from the hydrothermal solution. Electrum is an alliage of gold and silver.

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
196.967 10.215 0 0 47.490 25.23
Reaction properties

Au(element) + 0.75O2 + 3H+ ⇌ Au+3 + 1.5H2O

298.15 K, 1 bar log10K: -11.45 ΔH°r: 49202 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -11.31 -11.45 -11.66 -11.92 -12.26 -12.62 -13.06 -13.60