Mineralogy Database

Uzonite Mineral Data

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General Uzonite Information

Help on Chemical  Formula: Chemical Formula: As4S5
Help on Composition: Composition: Molecular Weight = 460.02 gm
   Arsenic  65.15 %  As
   Sulfur   34.85 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: As4S5
Help on Environment: Environment: As intergrowths with realgar in the pore spaces of tuffaceous sediments in a caldera.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Uzon caldera, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Uzonite Say UZONITE
Help on Synonym: Synonym: ICSD 16107
  PDF 39-331

Uzonite Image

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Comments: Yellow powdery uzonite encrustation.
Location: Uzon Volcano, Kamchatka District, Russian Far East, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uzonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9848:1:0.8829
Help on Cell Dimensions: Cell Dimensions: a = 7.973, b = 8.096, c = 7.148, Z = 2; beta = 100.01° V = 454.38 Den(Calc)= 3.36
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.599(1)(120), 5.8042(0.74)(101), 2.8135(0.66)(220),5.3023(0.64)(011), 2.7448(0.47)(221), 2.9021(0.41)(202), 2.024(0.39)(040), 3.219(0.28)(012),

Physical Properties of Uzonite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Yellow.
Help on Density: Density: 3.37
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: yellow

Optical Properties of Uzonite

Help on Optical Data: Optical Data: Biaxial (+), a=2.38, g=2.68, bire=0.3000
Help on RL Color: RL Color: Grayish white with bright yellow internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Uzonite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   20.10   18.80 
 425 nm   20.00   18.80 
 450 nm   19.90   18.70 
 475 nm   19.70   18.30 
 500 nm   19.20   18.10 
 525 nm   19.80   19.00 
 550 nm   20.00   19.40 
 575 nm   19.90   19.40 
 600 nm   19.70   19.30 
 625 nm   19.40   19.20 
 650 nm   19.30   19.10 
 675 nm   19.20   19.00 
 700 nm   19.00   18.80 
Calculated Relative Intensity Colors of Uzonite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450% 480%

Calculated Properties of Uzonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Uzonite =3.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0026139829
Boson Index = 0.9973860171
Help on Photoelectric: Photoelectric: PEUzonite = 47.63 barns/electron
U=PEUzonite x rElectron Density= 147.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Uzonite is Not Radioactive

Uzonite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.22)Realgar Series Realgar AsS P 21/n 2/m Pararealgar AsS P 21/c 2/m Uzonite As4S5 P 21/m 2/m Alacranite As8S9 P 2/c 2/m
Help on  Strunz Class: Strunz Class: 02.FA.25 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.FA -With As, (Sb), S
02.FA.25 Uzonite As4S5 P 21/m 2/m

Other Uzonite Information

Help on References: References: NAME( Athena) PHYS. PROP.(Dana8, CanMin v 41, p 1463) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Uzonite :
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: 02.FA.25





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