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Katoptrite Mineral Data |
General Katoptrite Information |
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(Mn,Mg)13(Al,Fe+++)4Sb+++++2Si2O28 | ||
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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 | |||
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100.00 % 100.05 % = TOTAL OXIDE | |||
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Mn2+11.7Mg1.4Al3.3Fe3+0.5Sb2.1Si2O28 | ||
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In metamorphosed limestones. | ||
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Valid Species (Pre-IMA) 1917 | ||
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Brattfors, Moss, and Jakobsberg mines, near Nordmark, Sweden. Link to MinDat.org Location Data. | ||
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Named from the Greek for "mirror", for the perfectly reflecting cleavage surfaces. | ||
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Katoptrite + Pronunciation ![]() |
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Catoptrite | ||
ICSD 121137 | |||
PDF 19-274 | |||
Katoptrite Image | |||
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Katoptrite Crystallography |
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a:b:c =0.244:1:0.3943 | ||
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a = 5.617, b = 23.02, c = 9.079, Z = 2; beta = 101.383° V = 1,150.85 Den(Calc)= 4.48 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m | ||
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By Intensity(I/Io): 2.96(1), 8.88(0.65), 4.43(0.45), | ||
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Physical Properties of Katoptrite |
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{001} Perfect | ||
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Black, Red. | ||
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4.56 | ||
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Translucent to Opaque | ||
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Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
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Anhedral Grains - Granular minerals without the expression of crystal shapes | ||
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Tabular - Form dimensions are thin in one direction. | ||
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5.5 - Knife Blade | ||
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Metallic | ||
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red brown | ||
Optical Properties of Katoptrite |
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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 |
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Biaxial (-), a=1.92, b=1.95, g=1.95, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0-5. Dispersion r > v strong. | ||
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strong red brown. | ||
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strong orange. | ||
Calculated Properties of Katoptrite |
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Bulk Density (Electron Density)=4.25 gm/cc note: Specific Gravity of Katoptrite =4.56 gm/cc. |
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Fermion Index = 0.004398122 Boson Index = 0.995601878 |
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PEKatoptrite = 63.79 barns/electron U=PEKatoptrite x rElectron Density= 271.23 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Katoptrite is Not Radioactive |
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Katoptrite Classification |
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44.03.05.01 (44)Antimonates | ||
(44.03)with miscellaneous formulae | |||
(44.03.05)Dana Group | |||
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09.AE.40 09 - SILICATES (Germanates) | ||
09.A - Nesosilicates | |||
09.AE -Nesosilicates with additional (O,OH,F,H2O); | |||
Other Katoptrite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4) | ||
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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 Search for Katoptrite using: Visit our Advertisers for Katoptrite : Ask about Katoptrite here : Print or Cut-and-Paste your Katoptrite Specimen Label here :
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