Deanesmithite Mineral Data

Deanesmithite Mineral Data
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General Deanesmithite Information

Help on Chemical Formula: Chemical Formula: Hg+2Hg++3Cr++++++O5S2
Help on Composition: Composition: Molecular Weight = 1,199.08 gm
   Chromium   4.34 %  Cr    8.34 % CrO3
   Mercury   83.64 %  Hg   34.79 % Hg2O / 54.19 % HgO
   Sulfur     5.35 %  S     5.35 % S2-
               -   %  S    -2.67 % -O=S 
   Oxygen     6.67 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Hg2Hg3CrO5S2
Help on Environment: Environment: Very rare in a mercury deposit in silicate-carbonate rock hydrothermally altered from serpentine.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Clear Creek claim, near the Clear Creek mercury mine, New Idria district, San Benito County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Deane K. Smith (1930-2001), Pennsylvania State University, University Park, Pennsylvania, USA.
Help on Name Pronunciation: Name Pronunciation: Deanesmithite + Pronunciation Say DEANESMITHITE
Help on Synonym: Synonym: IMA1991-001
 

Deanesmithite Image

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Deanesmithite

Comments: SEM image showing several crystals of deanesmithite protruding from matrix. (CanMin v31:787).
Location: Small prospect pit near the long-abandoned Clear Creek mercury mine, New Idria district, San Benito County, Califomia, USA. Scale: Scale Bar 40 µm.
© Canadian Mineralogist

Deanesmithite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8542:1:0.7252
Help on Cell Dimensions: Cell Dimensions: a = 8.116, b = 9.501, c = 6.891, Z = 2; alpha = 100.43°, beta = 110.24°, gamma = 82.8° V = 486.45 Den(Calc)= 8.19
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.008(1), 5.72(0.9), 3.373(0.6),
Click Here for Large Deanesmithite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Szymanski J T , Groat L A , The Canadian Mineralogist , 35 (1997) p.765-772, The crystal structure of deanesmithite, Hg2Hg3CrO5S2

 

Physical Properties of Deanesmithite

Help on Cleavage: Cleavage: {110} Good, {001} Fair
Help on Color: Color: Orange red.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fan Shaped - Occurs as radiating crystals shaped like a fan.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: orange red
 

Optical Properties of Deanesmithite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.18 - from Gladstone-Dale relationship (KC = 0.1447) where Ncalc=Dcalc*KC+1
Help on Pleochroism (x): Pleochroism (x): weak orange yellow.
Help on Pleochroism (z): Pleochroism (z): dark reddish orange.
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on RL Color: RL Color: Dark bluish gray to pale gray with bright yellow-orange internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Deanesmithite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   24.80   23.10 
   
 420 nm   25.20   23.10 
 440 nm   24.80   23.15 
 460 nm   23.80   23.30 
 480 nm   22.90   23.60 
 500 nm   22.10   23.80 
 520 nm   21.30   23.50 
 540 nm   20.50   22.90 
 560 nm   20.10   22.05 
 580 nm   20.00   21.70 
 600 nm   20.00   21.55 
 620 nm   19.90   21.30 
 640 nm   19.70   21.00 
 660 nm   19.60   20.80 
 680 nm   19.40   20.45 
 700 nm   19.25   20.30 
Calculated Relative Intensity Colors of Deanesmithite in Air
Relative
Intensity		    0%   50% 100% 150% 200% 250% 300% 350% 400% 440%
R1                    
R2                    
 

Calculated Properties of Deanesmithite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.73 gm/cc
note: Specific Gravity of Deanesmithite =8.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.25
Boson Index = 0.75
Help on Photoelectric: Photoelectric: PEDeanesmithite =1,432.52 barns/electron
U=PEDeanesmithite x rElectron Density=9,646.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Deanesmithite is Not Radioactive
 

Deanesmithite Classification
Help on Dana Class: Dana Class: 35.04.03.01 (35)Anhydrous Chromates
  (35.04)with miscellaneous formulae
  (35.04.03)Dana Group
 
35.04.03.01 Deanesmithite Hg2Hg3CrO5S2 P1 1
Help on Strunz Class: Strunz Class: 07.FB.20 07 - SULFATES (SELENATES, TELLURATES)
  07.F - Chromates
  07.FB -With additional O, V, S, Cl
 
07.FB.20 Deanesmithite Hg2Hg3CrO5S2 P1 1
 

Other Deanesmithite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(AntBidBlaNic5)
Help on See Also: See Also: Links to other databases for Deanesmithite :
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
15 - WWW-MINCRYST

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Deanesmithite

Hg+2Hg++3Cr++++++O5S2
Dana No: 35.04.03.01 Strunz No: 07.FB.20
Locality:

 

Notes: