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Mineral speciesFormula
 BiliniteFe3(SO4)4:22H2O 
Mineralogy
Space group: Monoclinic - Prismatic HM symbol (2/m) Space Group: P 21/c 
Dana class: 29.7.3.5VI- 29 Hydrated Acid and Sulfates ; 29.7 Hydrated Acid and Sulfates where A(?)2 (XO4)4 . x(H2O) ; 29.7.3 Halotrichite Group (Monoclinic with 22 H2O) 
Geological context
Geological context: An alteration of iron sulfide in lignite (Svietec, Czech Republic); a post-mine mineral with other iron sulfates (Nikitov deposits, Ukraine). 
Thermodynamics
Individual properties
Molar weight: 948.132 g/mol  ΔGºf-8,409,612 J/mol ref.  Sº: 1,243.00 J/mol/K ref. 
  ΔHºf-10,121,000 J/mol ref.   
Reaction properties
Chemical reaction:  Bilinite = 2Fe+3 + 4SO4-2 + Fe+2 + 22H2O 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -7.13798890e+3   -1.03629347e+0   3.85867226e+5   2.57782815e+3   -2.15350092e+7 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)-16.34
ΔH°r205,143 J/mol ref.
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  -16.40   -16.34   -16.02   -15.31   -14.22   -13.29   -12.95   -13.91 

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