Tocornalite Mineral Data

General Tocornalite Information

Chemical Formula:

(Ag,Hg)I (?)

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

Empirical Formula:

Ag_0.75Hg_0.25I

Environment:

Found with other halides of silver and mercury. A questionable species.

IMA Status:

Valid Species (Pre-IMA) 1867

Locality:

Chanarcillo, Atacama, Chile. Link to MinDat.org Location Data.

Name Origin:

Named in 1867 for S. F. Tocornal, rector of the University of Santiago, Chile.

Name Pronunciation:

Tocornalite + Pronunciation

Tocornalite Image

Images:

Tocornalite

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

Crystal System:

HexagonalSpace Group: Hex ?

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

By Intensity(I/I_o): 2.644(1), 3.61(0.9), 3.76(0.9),

Physical Properties of Tocornalite

Color:

Yellow, Bright yellow, Gray green, Black.

Fracture:

Plastic - Deforms like soft, plastic materials.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Luster:

Earthy (Dull)

Optical Properties of Tocornalite

Optical Data:

Calculated Properties of Tocornalite

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Tocornalite= 610.33 barns/electron
U=PE_Tocornalite x rElectron Density= . barns/cc.

Radioactivity:

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

Tocornalite Classification

Dana Class:

09.01.06.01 (09)Anhydrous and Hydrated Halides

(09.01)where A X

(09.01.06)Dana Group

09.01.06.01 Tocornalite (Ag,Hg)I(?) Hex ? Hex

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

References:

NAME( Dana8) PHYS. PROP.(Dana8)

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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Ask about Tocornalite here :
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Print or Cut-and-Paste your Tocornalite Specimen Label here :

Tocornalite

(Ag,Hg)I (?)
Dana No: 09.01.06.01 Strunz No: 03.AA.10
Locality:

Notes: