Mineralogy Database

Kutnohorite Mineral Data

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General Kutnohorite Information

Help on Chemical  Formula: Chemical Formula: Ca(Mn,Mg,Fe++)(CO3)2
Help on Composition: Composition: Molecular Weight = 205.94 gm
   Calcium    19.46 %  Ca   27.23 % CaO
   Magnesium   3.54 %  Mg    5.87 % MgO
   Manganese  16.01 %  Mn   20.67 % MnO
   Iron        2.71 %  Fe    3.49 % FeO
   Carbon     11.66 %  C    42.74 % CO2
   Oxygen     46.61 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMn2+0.6Mg0.3Fe2+0.1(CO3)2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1901
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality in Czechoslovakia.
Help on Name Pronunciation: Name Pronunciation: Kutnohorite + Pronunciation Say KUTNOHORITE
Help on Synonym: Synonym: ICSD 202247
  Kutnahorite
  PDF 11-345
 

Kutnohorite Image

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  Kutnohorite

Comments: Light-pinkish, parallel bundles of kutnohorite crystals on matrix.
Location: Wessels mine, Hotazel, Kuruman District, South Africa. Scale: 5 x 4.7 x 3 cm.
© Fabre Minerals

Kutnohorite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.36907
Help on Cell Dimensions: Cell Dimensions: a = 4.85, c = 16.34, Z = 3; V = 332.86 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.94(1), 1.814(0.3), 1.837(0.25),
Help on Forms: Forms:

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Drag1 - Manipulate Crystal
Drag2 - Resize

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Help on Above

Forms: ( 1 0 1)

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Physical Properties of Kutnohorite

Help on Cleavage: Cleavage: {1011} Perfect, {1011} Perfect, {1011} Perfect
Help on Color: Color: White, Light yellow, Light pink.
Help on Density: Density: 3.1 - 3.12, Average = 3.11
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Kutnohorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2049,KPDmeas= 0.2029,KC= 0.2064
Ncalc = 1.64
Help on Optical Data: Optical Data: Uniaxial (-), e=1.535, w=1.727, bire=0.1920.
 

Calculated Properties of Kutnohorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Kutnohorite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0058852001
Boson Index = 0.9941147999
Help on Photoelectric: Photoelectric: PEKutnohorite = 7.48 barns/electron
U=PEKutnohorite x rElectron Density= 22.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kutnohorite is Not Radioactive
 

Kutnohorite Classification

Help on  Dana Class: Dana Class: 14.02.01.03 (14)Anhydrous Carbonates
  (14.02)with Compound Formula A+ B++ (CO3)2
  (14.02.01)Dolomite Group (Trigonal: R-3)
 
14.02.01.01 Dolomite CaMg(CO3)2 R 3 3
 
14.02.01.02 Ankerite Ca(Fe,Mg,Mn)(CO3)2 R 3 3
 
14.02.01.03 Kutnohorite Ca(Mn,Mg,Fe)(CO3)2 R 3 3
 
14.02.01.04 Minrecordite CaZn(CO3)2 R 3 3
Help on  Strunz Class: Strunz Class: 05.AB.10 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AB -Alkali-earth (and other M2+) carbonates
 
05.AB.10 Ankerite Ca(Fe,Mg,Mn)(CO3)2 R 3 3
 
05.AB.10 Dolomite CaMg(CO3)2 R 3 3
 
05.AB.10 Kutnohorite Ca(Mn,Mg,Fe)(CO3)2 R 3 3
 
05.AB.10 Minrecordite CaZn(CO3)2 R 3 3
 

Other Kutnohorite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Kutnohorite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
18 - theimage

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Print or Cut-and-Paste your Kutnohorite Specimen Label here :

Kutnohorite

Ca(Mn,Mg,Fe++)(CO3)2
Dana No: 14.02.01.03 Strunz No: 05.AB.10
Locality:

 

Notes:

 

 
   
 


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