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Mineral speciesFormula
 ClinochloreMg5Al(AlSi3)O10(OH)8 
Mineralogy
Family: Chlorite Group 
Space group: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m 
Dana class: 71.4.1.4 (71)Phyllosilicate Sheets of Six-Membered Rings (71.4)interlayered 1:1, 2:1, and octahedra (71.4.1)Chlorite group (Tri-Dioctahedral) 
Geological context
High temperature: Around 100C to 600C C according Fe,Mg, Al substitutions. 
Geological context: Contact, hydrothermal, and regional metamorphism of mafic minerals. A product of low-grade metamorphism of Al, Mg-rich rocks. 
Thermodynamics
Individual properties
Molar weight: 555.797 g/mol  ΔGºf-8,250,584 J/mol ref.  Sº: 435.15 J/mol/K ref. 
  ΔHºf-8,909,590 J/mol ref.  Cp: 516.34 J/mol/K ref. 
Reaction properties
Chemical reaction:  Clinochlore + 16H+ = 2Al+3 + 5Mg+2 + 3H4SiO4 + 6H2O 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -2.85891987e+3   -4.43228065e-1   1.76633052e+5   1.02912469e+3   -7.66029629e+6 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)61.69
ΔH°r-600,773 J/mol ref.
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  71.36   61.69   50.71   40.84   31.16   23.37   16.67   10.51 
Maier Kelley
Cp(T) = a + b*10-3T + C*105T-2 (with T expressed in Kelvin)  ref.
a:631.95 J/mol/K 
b:282.68 J/mol/K2 
c:-177.69 J.K/mol 

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