Mineralogy Database

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

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 - Prismatic H-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 Diaphaneity: Diaphaneity: 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 Gladstone-Dale: Gladstone-Dale: CI meas= 0.208 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.275 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1011,KPDmeas= 0.1104,KC= 0.1394
Ncalc = 2.26 - 2.38
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
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 570%

Calculated Properties of Chursinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.55 gm/cc
note: Specific Gravity of Chursinite =9.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.22
Boson Index = 0.78
Help on Photoelectric: Photoelectric: PEChursinite =1,272.63 barns/electron
U=PEChursinite x rElectron Density=9,606.61 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)Anhydrous Phosphates, etc
  (38.05)with miscellaneous formulae
  (38.05.01)Dana Group Chursinite HgHg(AsO4) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.AD.60 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
08.AD.60 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 - 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: 08.AD.60





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