Chursinite Mineral Data


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General Chursinite Information
Help on Chemical Formula: Chemical Formula: Hg+Hg++(AsO4)
Help on Composition: Composition: Molecular Weight = 540.10 gm
   Mercury  74.28 %  Hg   38.62 % Hg2O / 40.10 % HgO
   Arsenic  13.87 %  As   21.28 % As2O5
   Oxygen   11.85 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: HgHg(AsO4)
Help on Environment: Environment: Oxidized portions of Sb-As-Hg ores.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Khaidarken Department, Kyrgyzstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Russian actress, Ludmilla A. Cursina.
Help on Synonym: Synonym: ICSD 2604
  PDF 38-399
 

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Chursinite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.7145:1:3.0826
Help on Cell Dimensions: Cell Dimensions: a = 8.71, b = 5.08, c = 15.66, Z = 6; beta = 128.27° V = 544.00 Den(Calc)= 9.89
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.05(1), 2.8(0.75), 2.84(0.7),
 

Physical Properties of Chursinite

Help on Cleavage: Cleavage: [???] Good
Help on Color: Color: Yellow brown, Orange brown.
Help on Density: Density: 9.06
Help on Diaphaniety: Diaphaniety: Transparent to Subopaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Tarnishes - Freshly fractured surfaces form a surface oxidation film
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: gray yellow
 

Optical Properties of Chursinite

Help on Optical Data: Optical Data: Biaxial (?), a=2
Help on Pleochroism (x): Pleochroism (x): pale brownish yellow.
Help on Pleochroism (z): Pleochroism (z): light brown.
Help on RL Anisotrophism: RL Anisotrophism: Dark brown to blue-gray.
Help on RL Color: RL Color: Gray with a bluish tint, tarnishes to bluish to bluish white file.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Chursinite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 460 nm   18.50   22.80 
   
 546 nm   16.10   20.40 
 590 nm   15.80   19.70 
 656 nm   14.50   18.50 
Calculated Relative Intensity Colors of Chursinite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 570%
R1                        
R2                        
 

Calculated Properties of Chursinite

Help on Electron Density: Electron Density:

relectron=8.24 gm/cc
note: rChursinite =9.89 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.22437
Boson Index = 0.77563
Help on Photoelectric: Photoelectric:

PEChursinite =1,272.63 barns/electron
U=PEChursinite x relectron=10486.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chursinite is Not Radioactive
 

Chursinite Classification
Help on Dana Class: Dana Class: 38.5.1.1 (38)Anhydrous Phosphates, etc
  (38.5)with miscellaneous formulae
  (38.5.1)Dana Group
 
38.5.1.1 Chursinite HgHg(AsO4) P 21/c 2/m
Help on Strunz Class: Strunz Class: VII/A.11-10 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na
  VII/A.11 - Chursinite series
 
VII/A.11-05 Tillmannsite! (Ag3Hg)(V,As)O4 I 4 4
 
VII/A.11-10 Chursinite HgHg(AsO4) P 21/c 2/m
 

Other Chursinite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Chursinite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Chursinite

Hg+Hg++(AsO4)
Dana No: 38.5.1.1 Strunz No: VII/A.11-10
Locality:

 

Notes:

 
 
   
 
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