Mineralogy Database

Kornelite Mineral Data

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General Kornelite Information

Help on Chemical  Formula: Chemical Formula: Fe+++2(SO4)3•7(H2O)
Help on Composition: Composition: Molecular Weight = 525.99 gm
   Iron      21.23 %  Fe   30.36 % Fe2O3
   Hydrogen   2.68 %  H    23.98 % H2O
   Sulfur    18.29 %  S    45.66 % SO3
   Oxygen    57.79 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+2(SO4)3•7(H2O)
Help on Environment: Environment: Secondary mineral formed from the oxidation of iron sulfides.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1888
Help on Locality: Locality: Szomolnok Copper Mine, Slovakia (Formerly Hungary). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Kornel Hlavacsek (1835-1914), hungarian mining engineer at the Szomolnok copper mine.
Help on Name Pronunciation: Name Pronunciation: Kornelite + Pronunciation Say KORNELITE
Help on Synonym: Synonym: ICSD 10374
  PDF 44-1426

Kornelite Image

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Comments: Sulfate matrix with several 1 cm sprays of kornelite. This specimen has to be protected from air as it is readily soluble in water.
Location: Rio Tinto Mine, Huelva, Spain. Scale: Picture size 1 cm.
© John Veevaert

Kornelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7107:1:0.2696
Help on Cell Dimensions: Cell Dimensions: a = 14.3, b = 20.12, c = 5.425, Z = 4; beta = 96.8° V = 1,549.88 Den(Calc)= 2.25
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10(1), 4.67(0.8), 6.64(0.8),

Physical Properties of Kornelite

Help on Cleavage: Cleavage: {010} Imperfect
Help on Color: Color: Pale rose pink, Violet.
Help on Density: Density: 2.306
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Silky
Help on Streak: Streak: pale red

Optical Properties of Kornelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2664,KPDmeas= 0.2599,KC= 0.258
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.572, b=1.586, g=1.64, bire=0.0680, 2V(Calc)=56, 2V(Meas)=49-62. Dispersion very weak, r > v.

Calculated Properties of Kornelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Kornelite =2.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0061549044
Boson Index = 0.9938450956
Help on Photoelectric: Photoelectric: PEKornelite = 7.30 barns/electron
U=PEKornelite x rElectron Density= 17.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kornelite is Not Radioactive

Kornelite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.08)where (A)2 (XO4)3 � x(H2O)
  (29.08.02)Dana Group Kornelite Fe2(SO4)3•7(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.CB.60 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
07.CB.60 Kornelite Fe2(SO4)3•7(H2O) P 21/c 2/m

Other Kornelite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kornelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.CB.60





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