Mineralogy Database

Kermesite Mineral Data

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General Kermesite Information

Help on Chemical  Formula: Chemical Formula: Sb2S2O
Help on Composition: Composition: Molecular Weight = 323.63 gm
   Antimony  75.24 %  Sb
   Sulfur    19.82 %  S
   Oxygen     4.94 %  O
            100.00 % 
Help on Empirical Formula: Empirical Formula: Sb2S2O
Help on Environment: Environment: A secondary mineral, as an alteration of stibnite, in antimony deposits
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1843
Help on Locality: Locality: Braunsdorf, near Freiberg, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name from kermes, a name given from the Persian qurmizq, "crimson" in the older chemistry to red amorphous antimony trisulphide, often mixed with antimony trioxide.
Help on Name Pronunciation: Name Pronunciation: Kermesite + Pronunciation Say KERMESITE
Help on Synonym: Synonym: ICSD 68346
  PDF 44-1435
  Red Antimony

Kermesite Image

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Comments: Reddish brown radiating spray of kermesite crystals on matrix.
Location: Pezinok (Pernek), near Bratislava, Solvakia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Paakkonenite   Kermesite

Comments: Much of the matrix is the gray metallic paakkonenite with red crystals of kermesite and minute yellow crystals of valentinite.
Location: Cai' ao mine, Danfong Co., Shaanxi Prov., China. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Kermesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.6633:1:2.5184
Help on Cell Dimensions: Cell Dimensions: a = 10.84, b = 4.07, c = 10.25, Z = 4; alpha = 90°, beta = 101.53°, gamma = 90° V = 443.09 Den(Calc)= 4.85
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.7(1), 5.3(1), 4.08(0.55),

Physical Properties of Kermesite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Violet red, Cherry red, Red.
Help on Density: Density: 4.5 - 4.6, Average = 4.55
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: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: brownish red

Optical Properties of Kermesite

Help on Optical Data: Optical Data: Biaxial (+), a=2.72, b=2.74, g=2.74, bire=0.0200
Help on Pleochroism (x): Pleochroism (x): cherry red.
Help on Pleochroism (y): Pleochroism (y): cherry red.
Help on Pleochroism (z): Pleochroism (z): cherry red.
Help on RL Anisotrophism: RL Anisotrophism: Very strong to extreme.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Kermesite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   31.10   37.50 
 420 nm   30.00   36.40 
 440 nm   29.00   35.20 
 460 nm   28.00   34.00 
 480 nm   27.20   33.00 
 500 nm   26.40   32.20 
 520 nm   25.70   31.30 
 540 nm   25.20   30.60 
 560 nm   24.80   30.00 
 580 nm   24.40   29.40 
 600 nm   24.00   29.00 
 620 nm   23.80   28.60 
 640 nm   23.50   28.20 
 660 nm   23.40   28.00 
 680 nm   23.20   27.80 
 700 nm   23.10   27.70 
Calculated Relative Intensity Colors of Kermesite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360%

Calculated Properties of Kermesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.26 gm/cc
note: Specific Gravity of Kermesite =4.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015099577
Boson Index = 0.9984900423
Help on Photoelectric: Photoelectric: PEKermesite = 253.30 barns/electron
U=PEKermesite x rElectron Density=1,078.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kermesite is Not Radioactive

Kermesite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.13.01)Dana Group Kermesite Sb2S2O P1 1
Help on  Strunz Class: Strunz Class: 02.FD.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FD -With O, OH, H2O
02.FD.05 Kermesite Sb2S2O P1 1

Other Kermesite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Kermesite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 02.FD.05





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