Chursinite Mineral Data

General Chursinite Information

Chemical Formula:

Hg+Hg++(AsO4)

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

Empirical Formula:

HgHg(AsO₄)

Environment:

Oxidized portions of Sb-As-Hg ores.

IMA Status:

Approved IMA 1984

Locality:

Khaidarken Department, Kyrgyzstan. Link to MinDat.org Location Data.

Name Origin:

Named for the Russian actress, Ludmilla A. Cursina.

Synonym:

ICSD 2604

PDF 38-399

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Chursinite Crystallography

Axial Ratios:

a:b:c =1.7145:1:3.0826

Cell Dimensions:

a = 8.71, b = 5.08, c = 15.66, Z = 6; beta = 128.27° V = 544.00 Den(Calc)= 9.89

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.05(1), 2.8(0.75), 2.84(0.7),

Crystal Structure:

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Kamenar B , Kaitner B , Acta Crystallographica, Section B , 29 (1973) p.1666-1669, The crystal structure of mercury(I) orthoarsenate, Locality: synthetic

Physical Properties of Chursinite

Cleavage:

{???} Good

Color:

Yellow brown, Orange brown.

Density:

9.06

Diaphaneity:

Transparent to Subopaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Tarnishes - Freshly fractured surfaces form a surface oxidation film

Hardness:

3-4 - Calcite-Fluorite

Luster:

Adamantine

Streak:

gray yellow

Optical Properties of Chursinite

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

Optical Data:

Biaxial (?), a=2

Pleochroism (x):

pale brownish yellow.

Pleochroism (z):

light brown.

RL Anisotrophism:

Dark brown to blue-gray.

RL Color:

Gray with a bluish tint, tarnishes to bluish to bluish white file.

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

Electron Density:

Bulk Density (Electron Density)=7.55 gm/cc
note: Specific Gravity of Chursinite =9.06 gm/cc.

Fermion Index:

Fermion Index = 0.22
Boson Index = 0.78

Photoelectric:

PE_Chursinite=1,272.63 barns/electron
U=PE_Chursinite x rElectron Density=9,606.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chursinite is Not Radioactive

Chursinite Classification

Dana Class:

38.05.01.01 (38)Anhydrous Phosphates, etc

(38.05)with miscellaneous formulae

(38.05.01)Dana Group

38.05.01.01 Chursinite HgHg(AsO4) P 2₁/c 2/m

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)

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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Print or Cut-and-Paste your Chursinite Specimen Label here :

Chursinite

Hg+Hg++(AsO4)
Dana No: 38.05.01.01 Strunz No: 08.AD.60
Locality:

Notes: