Difference between revisions of "Iron pyrite"

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|m1=Fe
 
|m1=Fe
 
|calcprod=Fe2O3
 
|calcprod=Fe2O3
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|calctemp=540-850
 
}}
 
}}
 
pyrite, along with [[Hematite]] and [[Magnetite]] is a primary ore of [[iron]].
 
pyrite, along with [[Hematite]] and [[Magnetite]] is a primary ore of [[iron]].

Revision as of 16:11, 30 September 2019

Iron pyrite 
Frequency common 
Hardness 6-6.5 
Density 5
Chemical Formula FeS2 
Core Elements Fe 
Thermal Decomposition
FeS2
540-850°C
Fe2O3

pyrite, along with Hematite and Magnetite is a primary ore of iron.

Weathering

In contact with a wet natural environment (water, air, perhaps sunlight), pyrite weathers producing ferrous (and perhaps ferric) sulfates:

4 FeS2(s) + 14 O2(g) + 4 H2O(l)  4 FeII + 8 SO42 - + 8 H + 
4 FeII + O2 + 4 H +   4 FeIII + 2 H2O
4 FeIII + 12 H2O  4 Fe(OH)3 + 12 H +