Tocornalite Mineral Data

Tocornalite Mineral Data +

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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.

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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)

Calculated Properties of Tocornalite

Fermion Index

Fermion Index = 0.05871
Boson Index = 0.94129

Photoelectric:

PE_Tocornalite= 610.33 barns/electron
U=PE_Tocornalite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tocornalite is Not Radioactive

Tocornalite Classification

Dana Class:

9.1.6.1 (9)Anhydrous and Hydrated Halides

(9.1)where A X

(9.1.6)Dana Group

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

Strunz Class:

III/A.03-20 III - Halogenides

III/A - Simple halogenides, without water Metal : Halogen = 1 : 1

III/A.03 - Jordargyrite - Tocornalite series

III/A.03-10 Iodargyrite AgI P 6₃mc 6mm

III/A.03-20 Tocornalite (Ag,Hg)I(?) Hex ? Hex

Other Tocornalite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

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

Tocornalite

(Ag,Hg)I (?)
Dana No: 9.1.6.1 Strunz No: III/A.03-20
Locality:

Notes: