Chursinite Mineral Data

Chursinite Mineral Data

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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),

Physical Properties of Chursinite

Cleavage:

[???] Good

Color:

Yellow brown, Orange brown.

Density:

9.06

Diaphaniety:

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

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:

r_electron=8.24 gm/cc
note: r_Chursinite=9.89 gm/cc.

Fermion Index

Fermion Index = 0.22437
Boson Index = 0.77563

Photoelectric:

PE_Chursinite=1,272.63 barns/electron
U=PE_Chursinite x r_electron=10486.69 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chursinite is Not Radioactive

Chursinite Classification

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

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

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

Chursinite

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

Notes:

Nov	OCT	Oct
	01
2006	2007	2008