Mineralogy Database

Tocornalite Mineral Data

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General Tocornalite Information

Help on Chemical  Formula: Chemical Formula: (Ag,Hg)I (?)
Help on Composition: Composition: Molecular Weight = 257.95 gm
   Silver   31.36 %  Ag   33.69 % Ag2O
   Mercury  19.44 %  Hg   20.22 % Hg2O
   Iodine   49.20 %  I    49.20 % I
              -   %   I    -3.10 % -O=I2    
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ag0.75Hg0.25I
Help on Environment: Environment: Found with other halides of silver and mercury. A questionable species.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1867
Help on Locality: Locality: Chanarcillo, Atacama, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1867 for S. F. Tocornal, rector of the University of Santiago, Chile.
Help on Name Pronunciation: Name Pronunciation: Tocornalite + Pronunciation Say TOCORNALITE

Tocornalite Image

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Comments: Pale yellow granular tocornalite in matrix.
Location: Block 14 Opencut, Broken Hill, Yancowinna Co., New South Wales, Australia. Scale: See Image.
© Rruff Database

Tocornalite Crystallography

Help on Crystal System: Crystal System: Hexagonal Space Group: Hex ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.644(1), 3.61(0.9), 3.76(0.9),

Physical Properties of Tocornalite

Help on Color: Color: Yellow, Bright yellow, Gray green, Black.
Help on Fracture: Fracture: Plastic - Deforms like soft, plastic materials.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Luster: Luster: Earthy (Dull)

Optical Properties of Tocornalite

Help on Optical Data: Optical Data:

Calculated Properties of Tocornalite

Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PETocornalite = 610.33 barns/electron
U=PETocornalite x rElectron Density= . barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tocornalite is Not Radioactive

Tocornalite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.01)where A X
  (09.01.06)Dana Group Tocornalite (Ag,Hg)I(?) Hex ? Hex
Help on  Strunz Class: Strunz Class: 03.AA.10 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.10 Iodargyrite AgI P 63mc 6mm
03.AA.10 Tocornalite (Ag,Hg)I(?) Hex ? Hex

Other Tocornalite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Tocornalite :
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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(Ag,Hg)I (?)
Dana No: Strunz No: 03.AA.10