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Lavrentievite Mineral Data

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General Lavrentievite Information

Help on Chemical  Formula: Chemical Formula: Hg3S2(Cl,Br)2
Help on Composition: Composition: Molecular Weight = 759.03 gm
   Mercury   79.28 %  Hg   82.44 % Hg2O
   Sulfur     8.45 %  S     8.45 % S2-
               -   %  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
Help on Empirical Formula: Empirical Formula: Hg3S2Cl1.5Br0.5
Help on Environment: Environment: In the oxidized zone of a hydrothermal deposit.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Arzak mercury deposits, Tuva, Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Michail Alexeevich Lavrentiev (1900-1980), Russian mathematician and academician, founder of the Siberian Academy of Science.
Help on Name Pronunciation: Name Pronunciation: Lavrentievite + Pronunciation Say LAVRENTIEVITE

Lavrentievite Image

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

Lavrentievite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7212:1:3.529
Help on Cell Dimensions: Cell Dimensions: a = 8.94, b = 5.194, c = 18.33, Z = 5; beta = 92.73° V = 850.18 Den(Calc)= 7.41
Help on Crystal System: Crystal System: Monoclinic Space Group: P 2/m,P 2,Pm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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

Help on Color: Color: Grayish black, Light yellow.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous - Adamantine

Optical Properties of Lavrentievite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.1523) where Ncalc=Dcalc*KC+1

Calculated Properties of Lavrentievite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Lavrentievite =7.41 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.24
Boson Index = 0.76
Help on Photoelectric: Photoelectric: PELavrentievite =1,358.08 barns/electron
U=PELavrentievite x rElectron Density=8,352.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lavrentievite is Not Radioactive

Lavrentievite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.03)where (A)3 (O,OH)2 Xq
  (10.03.04)Dana Group Lavrentievite Hg3S2(Cl,Br)2 P 2/m,P 2,Pm Mono Arzakite Hg3S2(Br,Cl)2 P 2/m,P 2,Pm Mono
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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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Dana No: Strunz No: 02.FC.15a





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