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Katoptrite Mineral Data

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General Katoptrite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Mg)13(Al,Fe+++)4Sb+++++2Si2O28
Help on Composition: Composition: Molecular Weight = 1,553.59 gm
   Magnesium   2.19 %  Mg    3.63 % MgO
   Manganese  41.37 %  Mn   53.42 % MnO
   Aluminum    5.73 %  Al   10.83 % Al2O3
   Iron        1.80 %  Fe    2.57 % Fe2O3
   Silicon     3.62 %  Si    7.73 % SiO2
   Antimony   16.46 %  Sb   21.86 % Sb2O5
   Oxygen     28.84 %  O
             ______        ______ 
             100.00 %      100.05 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+11.7Mg1.4Al3.3Fe3+0.5Sb2.1Si2O28
Help on Environment: Environment: In metamorphosed limestones.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1917
Help on Locality: Locality: Brattfors, Moss, and Jakobsberg mines, near Nordmark, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "mirror", for the perfectly reflecting cleavage surfaces.
Help on Name Pronunciation: Name Pronunciation: Katoptrite + Pronunciation Say KATOPTRITE
Help on Synonym: Synonym: Catoptrite
  ICSD 121137
  PDF 19-274
 

Katoptrite Image

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  Katoptrite

Comments: Red-brown grains of katoptite in matrix.
Location: Jakobsberg, Nordmark, Sweden. Scale: Box Size 4x6 cm.
© Sonke Stolze / Systematic Minerals

Katoptrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.244:1:0.3943
Help on Cell Dimensions: Cell Dimensions: a = 5.617, b = 23.02, c = 9.079, Z = 2; beta = 101.383° V = 1,150.85 Den(Calc)= 4.48
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.96(1), 8.88(0.65), 4.43(0.45),
Help on Forms: Forms:

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Help on Above

Forms: ( 1 1 1) ( 0 1 1) ( 1 3 1) ( 0 1 0) ( 1 1 1) ( 1 0 0) ( 1 1 0) ( 0 0 1)

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Physical Properties of Katoptrite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Black, Red.
Help on Density: Density: 4.56
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Metallic
Help on Streak: Streak: red brown
 

Optical Properties of Katoptrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.09 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2098,KPDmeas= 0.2061,KC= 0.1926
Ncalc = 1.86 - 1.88
Help on Optical Data: Optical Data: Biaxial (-), a=1.92, b=1.95, g=1.95, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0-5. Dispersion r > v strong.
Help on Pleochroism (x): Pleochroism (x): strong red brown.
Help on Pleochroism (z): Pleochroism (z): strong orange.
 

Calculated Properties of Katoptrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.25 gm/cc
note: Specific Gravity of Katoptrite =4.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.004398122
Boson Index = 0.995601878
Help on Photoelectric: Photoelectric: PEKatoptrite = 63.79 barns/electron
U=PEKatoptrite x rElectron Density= 271.23 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Katoptrite is Not Radioactive
 

Katoptrite Classification

Help on  Dana Class: Dana Class: 44.03.05.01 (44)Antimonates
  (44.03)with miscellaneous formulae
  (44.03.05)Dana Group
 
44.03.05.01 Katoptrite (Mn,Mg)13(Al,Fe)4Sb2Si2O28 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.AE.40 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AE -Nesosilicates with additional (O,OH,F,H2O);
 
09.AE.40 Katoptrite (Mn,Mg)13(Al,Fe)4Sb2Si2O28 C 2/m 2/m
 

Other Katoptrite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Katoptrite :
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
15 - WWW-MINCRYST

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Katoptrite

(Mn,Mg)13(Al,Fe+++)4Sb+++++2Si2O28
Dana No: 44.03.05.01 Strunz No: 09.AE.40
Locality:

 

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