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Lavrentievite Mineral Data
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General Lavrentievite Information
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 Chemical Formula: |
Hg3S2(Cl,Br)2 |
| Composition: |
Molecular Weight = 759.03 gm |
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Mercury 79.28 % Hg 82.44 % Hg2O |
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Sulfur 8.45 % S 8.45 % S2- |
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- % S -4.22 % -O=S |
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Bromine 5.26 % Br 5.26 % Br |
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- %
Br -0.53 % -O=Br2 |
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Chlorine 7.01 % Cl 7.01 % Cl |
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- %
Cl -1.58 % -O=Cl2 |
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______ ______ |
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100.00 % 96.84 % = TOTAL OXIDE |
| Empirical Formula: |
Hg3S2Cl1.5Br0.5 |
| 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  |
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Lavrentievite Image |
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Images:
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Lavrentievite
Comments: Yellow - brown lavrentievite with red cinnabar crystals in matrix.
Location: Kadyrel'skoye Deposit, Tuva, Siberia, Russia.
Scale: Not Given.
© Diederik Visser |
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Lavrentievite Crystallography
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| 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: |
Monoclinic Space Group: P 2/m,P 2,Pm |
| 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), |
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Physical Properties of Lavrentievite
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| 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 |
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Optical Properties of Lavrentievite
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| Optical Data: |
Biaxial (?) |
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NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.1523) where Ncalc=Dcalc*KC+1
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Calculated Properties of Lavrentievite
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| Electron Density: |
Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Lavrentievite =7.41 gm/cc.
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| Fermion Index: |
Fermion Index = 0.24
Boson Index = 0.76 |
| Photoelectric: |
PELavrentievite =1,358.08 barns/electron
U=PELavrentievite x rElectron Density=8,352.65 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lavrentievite is Not Radioactive |
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Lavrentievite Classification
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| Dana Class: |
10.03.04.01 (10)Oxyhalides and Hydroxyhalides |
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(10.03)where (A)3 (O,OH)2 Xq |
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(10.03.04)Dana Group |
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10.03.04.01 Lavrentievite Hg3S2(Cl,Br)2 P 2/m,P 2,Pm Mono |
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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 |
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02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O |
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02.FC -With Cl, Br, I (halide-sulfides) |
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02.FC.15a Arzakite Hg3S2(Br,Cl)2 P 2/m,P 2,Pm Mono |
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02.FC.15a Corderoite Hg3S2Cl2 I 213 2 3 |
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02.FC.15a Lavrentievite Hg3S2(Cl,Br)2 P 2/m,P 2,Pm Mono |
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Other Lavrentievite Information
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| 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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Lavrentievite
Hg3S2(Cl,Br)2
Dana No: 10.03.04.01 Strunz No: 02.FC.15a
Locality:
Notes:
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