Lavrentievite Mineral Data

General Lavrentievite Information

Chemical Formula:

Hg3S2(Cl,Br)2

Composition:

Molecular Weight = 759.03 gm

Mercury 79.28 % Hg 82.44 % Hg₂O

Sulfur 8.45 % S 8.45 % S^2-

- % S -4.22 % -O=S

Bromine 5.26 % Br 5.26 % Br

- % Br -0.53 % -O=Br₂

Chlorine 7.01 % Cl 7.01 % Cl

- % Cl -1.58 % -O=Cl₂

______ ______

100.00 % 96.84 % = TOTAL OXIDE

Empirical Formula:

Hg₃S₂Cl_1.5Br_0.5

Environment:

In the oxidized zone of a hydrothermal deposit.

IMA Status:

Approved IMA 1984

Locality:

Arzak mercury deposits, Tuva, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Michail Alexeevich Lavrentiev (1900-1980), Russian mathematician and academician, founder of the Siberian Academy of Science.

Name Pronunciation:

Lavrentievite + Pronunciation

Lavrentievite Image

Images:

Lavrentievite

Comments: Yellow - brown lavrentievite with red cinnabar crystals in matrix.
Location: Kadyrel'skoye Deposit, Tuva, Siberia, Russia. Scale: Not Given.
© Diederik Visser

Lavrentievite Crystallography

Axial Ratios:

a:b:c =1.7212:1:3.529

Cell Dimensions:

a = 8.94, b = 5.194, c = 18.33, Z = 5; beta = 92.73° V = 850.18 Den(Calc)= 7.41

Crystal System:

MonoclinicSpace Group: P 2/m,P 2,Pm

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

By Intensity(I/I_o): 2.61(1), 3.01(0.6), 1.587(0.5),3.38(0.5), 2.2(0.4), 2.29(0.4), 3.96(0.4), 5(0.3),

Physical Properties of Lavrentievite

Color:

Grayish black, Light yellow.

Diaphaneity:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Vitreous - Adamantine

Optical Properties of Lavrentievite

Optical Data:

Biaxial (?)

NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.1523) where Ncalc=Dcalc*KC+1

Calculated Properties of Lavrentievite

Electron Density:

Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Lavrentievite =7.41 gm/cc.

Fermion Index:

Fermion Index = 0.24
Boson Index = 0.76

Photoelectric:

PE_{Lavrentievite}=1,358.08 barns/electron
U=PE_{Lavrentievite} x rElectron Density=8,352.65 barns/cc.

Radioactivity:

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

Lavrentievite Classification

Dana Class:

10.03.04.01 (10)Oxyhalides and Hydroxyhalides

(10.03)where (A)3 (O,OH)2 Xq

(10.03.04)Dana Group

10.03.04.01 Lavrentievite Hg3S2(Cl,Br)2 P 2/m,P 2,Pm Mono

10.03.04.02 Arzakite Hg3S2(Br,Cl)2 P 2/m,P 2,Pm Mono

Strunz Class:

02.FC.15a 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.FC -With Cl, Br, I (halide-sulfides)

02.FC.15a Arzakite Hg3S2(Br,Cl)2 P 2/m,P 2,Pm Mono

02.FC.15a Corderoite Hg3S2Cl2 I 2₁3 2 3

02.FC.15a Lavrentievite Hg3S2(Cl,Br)2 P 2/m,P 2,Pm Mono

Other Lavrentievite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Lavrentievite :
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 Lavrentievite Specimen Label here :

Lavrentievite

Hg3S2(Cl,Br)2
Dana No: 10.03.04.01 Strunz No: 02.FC.15a
Locality:

Notes: