Paracoquimbite Mineral Data + Say PARACOQUIMBITE

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General Paracoquimbite Information

Help on Chemical  Formula: Chemical Formula: Fe+++2(SO4)3·9(H2O)
Help on Composition: Composition: Molecular Weight = 562.02 gm
   Iron      19.87 %  Fe   28.41 % Fe2O3
   Hydrogen   3.23 %  H    28.85 % H2O
   Sulfur    17.12 %  S    42.74 % SO3
   Oxygen    59.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+2(SO4)3·9(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1935
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 15211
  PDF 27-254
 

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Paracoquimbite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.6935
Help on Cell Dimensions: Cell Dimensions: a = 10.93, c = 51.3, Z = 12; V = 5,307.48 Den(Calc)= 2.11
Help on Crystal System: Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.26(1), 2.76(0.75), 5.45(0.65),
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Robinson P D , Fang J H , American Mineralogist , 56 (1971) p.1567-1572, Crystal structures and mineral chemistry of hydrated ferric sulphates: II. The, crystal structure of paracoquimbite

 

Physical Properties of Paracoquimbite

Help on Cleavage: Cleavage: [0112] Indistinct, [1014] Indistinct
Help on Color: Color: Light violet.
Help on Density: Density: 2.11
Help on Diaphaniety: Diaphaniety: Transparent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Paracoquimbite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2618,KPDmeas= 0.2618,KC= 0.2632
Help on Optical Data: Optical Data: Uniaxial (+), w=1.55, e=1.555, bire=0.0050.
 

Calculated Properties of Paracoquimbite

Help on Electron Density: Electron Density:

relectron=2.15 gm/cc
note: rParacoquimbite =2.11 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00578
Boson Index = 0.99422
Help on Photoelectric: Photoelectric:

PEParacoquimbite = 6.81 barns/electron
U=PEParacoquimbite x relectron= 14.63 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paracoquimbite is Not Radioactive

 

Paracoquimbite Classification

Help on  Dana Class: Dana Class: 29.8.4.1 (29)Hydrated Acid and Sulfates
  (29.8)where (A)2 (XO4)3 · x(H2O)
  (29.8.4)Dana Group
 
29.8.4.1 Paracoquimbite Fe2(SO4)3·9(H2O) R 3 3
Help on  Strunz Class: Strunz Class: VI/C.08-50 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size
  VI/C.08 - Rhomboclase - Meta-alunogen series
 
VI/C.08-10 Rhomboclase (H5O2)Fe(SO4)2·2(H2O) P nma 2/m 2/m 2/m
 
VI/C.08-20 Lausenite Fe2(SO4)3·6(H2O) Unk. Mono
 
VI/C.08-30 Kornelite Fe2(SO4)3·7(H2O) P 21/c 2/m
 
VI/C.08-40 Coquimbite Fe2(SO4)3·9(H2O) P 3c 3 2/m
 
VI/C.08-50 Paracoquimbite Fe2(SO4)3·9(H2O) R 3 3
 
VI/C.08-60 Quenstedtite Fe2(SO4)3·10(H2O) P1 1
 
VI/C.08-70 Alunogen Al2(SO4)3·17(H2O) P1 1
 
VI/C.08-80 Meta-alunogen Al4(SO4)6·27(H2O) Mono
 

Other Paracoquimbite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Paracoquimbite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Paracoquimbite

Fe+++2(SO4)3·9(H2O)
Dana No: 29.8.4.1 Strunz No: VI/C.08-50
Locality:

 

Notes:

 

 
   
 
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